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Author SHA1 Message Date
Matej Focko
0097be0bf8
1851(E,rs): try solving “Nastya and Potions” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-31 18:06:56 +02:00
Matej Focko
9c74f2847d
1851(rs): solve contest 
* “A. Escalator Conversations”
* “B. Parity Sort”
* “C. Tiles Comeback”

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-31 18:06:51 +02:00
Matej Focko
d7af3b2543
chore(rs): refactor the ‹main› 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 23:18:21 +02:00
Matej Focko
44aa0b6d6d
chore(rs): reorder modules to reflect alphabetic order 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 19:51:35 +02:00
Matej Focko
cae33b8f38
chore(rs): remove unused ‹use› 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 19:51:22 +02:00
Matej Focko
b9135e34a2
chore(rs): refactor reading ‹Vec<T>› 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 19:48:45 +02:00
Matej Focko
b48cdc97f9
chore(rs): add aliases 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 19:48:35 +02:00
Matej Focko
c376b11d32
chore(rs): add ‹Z› 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 19:47:35 +02:00
Matej Focko
ee4703623b
chore(rs): format 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 19:47:30 +02:00
Matej Focko
b8e79c09f6
chore(cpp): add Y-combinator 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 16:01:32 +02:00
Matej Focko
7c7377e138
chore(cpp): add debugging output 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 16:01:18 +02:00
Matej Focko
e9a7fb0955
chore(cpp): add ‹<<› for containers 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 16:00:10 +02:00
Matej Focko
f6e3929fee
chore(cpp): don't use Catch2 to allow faster iterations 
* Also rework the way ‹main› is done

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 15:59:06 +02:00
Matej Focko
17e43f0ebf
chore(cpp): don't use namespaces in skeleton 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 15:57:32 +02:00
Matej Focko
42315a22b8
chore(cpp): extend the includes 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-29 15:27:25 +02:00
Matej Focko
403112b61e
110(A,cpp): solve “Nearly Lucky Number” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-25 23:04:09 +02:00
Matej Focko
7ec83aafc4
1850(rs): solve contest 
* “A. To My Critics”
* “B. Ten Words of Wisdom”
* “C. Word on the Paper”
* “D. Balanced Round”
* “E. Cardboard for Pictures”
* “F. We Were Both Children”
* “G. The Morning Star”
* “H. The Third Letter”

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-24 23:10:56 +02:00
Matej Focko
7e4ed33c34
chore(rs): add unsigned shifts and ‹isqrt› 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-24 23:07:50 +02:00
Matej Focko
c78900b631
chore(rs): use ‹min›/‹max› and ‹HashMap› in skeleton 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-24 23:07:14 +02:00
Matej Focko
183ebc2891
chore(rs): fix clippy warnings 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-24 23:07:01 +02:00
Matej Focko
2062f120cc
chore(rs): ignore skeleton in contests 
Rust skeleton gets copied to ‹bin/› directory of Cargo project.

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-24 23:03:28 +02:00
Matej Focko
1913a247b4
chore(rs): fix warnings 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-23 21:33:13 +02:00
Matej Focko
bbe76f33d6
chore(rs): create a template and adjust gitignore 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-23 21:33:09 +02:00
Matej Focko
f333cf115a
chore(java): adjust skeleton 
* add comments marking the regions
* adjust runner to take care of SINGLE v. MULTIPLE test cases

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-23 20:45:21 +02:00
Matej Focko
02cbe139e9
chore(cpp): use fully-qualified names 
use fully-qualified names in the helpers instead of abusing the ‹using›

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-23 20:42:09 +02:00
Matej Focko
663472e5da
chore(cpp): improve the template 
* add missing headers: ‹bit›, ‹map›, ‹queue› and ‹set›
* name the namespaces
* math
  * introduce ‹MODULO› for big numbers in problems
* input
  * implement ‹load_vector›
* output
  * implement ‹operator<<› for ‹std::pair›
  * implement ‹yesno› as shortcut for YES/NO answers
* implement ‹LOOP(n)› for quick range-like for-loops
* make ‹N› test cases the default

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-23 11:39:05 +02:00
Matej Focko
0bfc6f808e
1829(cpp): solve contest 
* “A. Love Story”
* “B. Blank Space”
* “C. Mr. Perfectly Fine”
* “D. Gold Rush”
* “E. The Lakes”
* “F. Forewer Winter”
* “G. Hits Different”
* “H. Don't Blame Me”

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-23 11:33:22 +02:00
Matej Focko
6589b762d9
41(A,cpp): solve “Translation” 
Signed-off-by: Matej Focko <mfocko@redhat.com>

diff --git a/41/a.cpp b/41/a.cpp
new file mode 100644
index 0000000..688673b
--- /dev/null
+++ b/41/a.cpp
@@ -0,0 +1,100 @@
+#include <algorithm>
+#include <cassert>
+#include <cctype>
+#include <cstdint>
+#include <functional>
+#include <iostream>
+#include <optional>
+#include <sstream>
+#include <string>
+#include <vector>
+
+namespace helpers {
+
+using namespace std;
+
+long pow(long base, long exp) {
+  if (exp == 0) return 1;
+  long half = pow(base, exp / 2);
+  if (exp % 2 == 0) return half * half;
+  return half * half * base;
+}
+
+template <typename T>
+inline void answer(const T& ans) {
+  cout << ans << "\n";
+}
+
+inline void yes() { cout << "YES\n"; }
+inline void no() { cout << "NO\n"; }
+
+inline void yesno(bool answer) {
+  if (answer) {
+    yes();
+  } else {
+    no();
+  }
+}
+
+}  // namespace helpers
+
+namespace {
+
+using namespace std;
+using namespace helpers;
+
+bool berlandish(const std::string& a, std::string b) {
+  std::reverse(b.begin(), b.end());
+  return a == b;
+}
+
+void solve() {
+  std::string l, r;
+  cin >> l >> r;
+
+  yesno(berlandish(l, r));
+}
+
+}  // namespace
+
+// for single test case, comment out for ‹N› test cases
+#define SINGLE
+
+#ifdef TEST
+
+#include "../.common/cpp/catch_amalgamated.hpp"
+
+TEST_CASE("examples") {
+  CHECK(berlandish("code", "edoc"));
+  CHECK(berlandish("edoc", "code"));
+
+  CHECK(!berlandish("abb", "aba"));
+  CHECK(!berlandish("aba", "abb"));
+
+  CHECK(!berlandish("code", "code"));
+}
+
+#else
+
+int main(void) {
+
+#ifdef SINGLE
+
+  solve();
+
+#else
+
+  // for multiple test cases
+  int N;
+  std::cin >> N >> std::ws;
+
+  for (auto i = 0; i < N; ++i) {
+    solve();
+  }
+
+#endif
+
+  return 0;
+}
+
+#endif
diff --git a/41/index.html b/41/index.html
new file mode 100644
index 0000000..20495ec
--- /dev/null
+++ b/41/index.html
@@ -0,0 +1,1035 @@
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+    <br style="clear: both;"/>
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+    <div style="text-align: center; font-size: 1.8rem; margin-bottom: 0.5em;"
+         class="caption">Codeforces Beta Round 40 (Div. 2)</div>
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+<div class="problemindexholder" problemindex="A" data-uuid="ps_8331c8f70a671d517c00a819fb942a10a8f3e6cf">
+    <div style="display: none; margin:1em 0;text-align: center; position: relative;" class="alert alert-info diff-notifier">
+        <div>The problem statement has recently been changed. <a class="view-changes" href="#">View the changes.</a></div>
+        <span class="diff-notifier-close" style="position: absolute; top: 0.2em; right: 0.3em; cursor: pointer; font-size: 1.4em;">&times;</span>
+    </div>
+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">A. Translation</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>The translation from the Berland language into the Birland language is not an easy task. Those languages are very similar: a berlandish word differs from a birlandish word with the same meaning a little: it is spelled (and pronounced) reversely. For example, a Berlandish word <span class="tex-font-style-tt">code</span> corresponds to a Birlandish word <span class="tex-font-style-tt">edoc</span>. However, it's easy to make a mistake during the «translation». Vasya translated word <span class="tex-span"><i>s</i></span> from Berlandish into Birlandish as <span class="tex-span"><i>t</i></span>. Help him: find out if he translated the word correctly.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains word <span class="tex-span"><i>s</i></span>, the second line contains word <span class="tex-span"><i>t</i></span>. The words consist of lowercase Latin letters. The input data do not consist unnecessary spaces. The words are not empty and their lengths do not exceed 100 symbols.</p></div><div class="output-specification"><div class="section-title">Output</div><p>If the word <span class="tex-span"><i>t</i></span> is a word <span class="tex-span"><i>s</i></span>, written reversely, print <span class="tex-font-style-tt">YES</span>, otherwise print <span class="tex-font-style-tt">NO</span>.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>code<br />edoc<br /></pre></div><div class="output"><div class="title">Output</div><pre>YES<br /></pre></div><div class="input"><div class="title">Input</div><pre>abb<br />aba<br /></pre></div><div class="output"><div class="title">Output</div><pre>NO<br /></pre></div><div class="input"><div class="title">Input</div><pre>code<br />code<br /></pre></div><div class="output"><div class="title">Output</div><pre>NO<br /></pre></div></div></div></div></div>
+</div>
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+<div class="problemindexholder" problemindex="B" data-uuid="ps_52bf049a3616d9620ca022505ce9aca4ccb23164">
+    <div style="display: none; margin:1em 0;text-align: center; position: relative;" class="alert alert-info diff-notifier">
+        <div>The problem statement has recently been changed. <a class="view-changes" href="#">View the changes.</a></div>
+        <span class="diff-notifier-close" style="position: absolute; top: 0.2em; right: 0.3em; cursor: pointer; font-size: 1.4em;">&times;</span>
+    </div>
+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">B. Martian Dollar</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>One day Vasya got hold of information on the Martian dollar course in bourles for the next <span class="tex-span"><i>n</i></span> days. The buying prices and the selling prices for one dollar on day <span class="tex-span"><i>i</i></span> are the same and are equal to <span class="tex-span"><i>a</i><sub class="lower-index"><i>i</i></sub></span>. Vasya has <span class="tex-span"><i>b</i></span> bourles. He can buy a certain number of dollars and then sell it no more than once in <span class="tex-span"><i>n</i></span> days. According to Martian laws, one can buy only an integer number of dollars. Which maximal sum of money in bourles can Vasya get by the end of day <span class="tex-span"><i>n</i></span>?</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains two integers <span class="tex-span"><i>n</i></span> and <span class="tex-span"><i>b</i></span> (<span class="tex-span">1 ≤ <i>n</i>, <i>b</i> ≤ 2000</span>) — the number of days and the initial number of money in bourles. The next line contains <span class="tex-span"><i>n</i></span> integers <span class="tex-span"><i>a</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">1 ≤ <i>a</i><sub class="lower-index"><i>i</i></sub> ≤ 2000</span>) — the prices of Martian dollars.</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print the single number — which maximal sum of money in bourles can Vasya get by the end of day <span class="tex-span"><i>n</i></span>.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>2 4<br />3 7<br /></pre></div><div class="output"><div class="title">Output</div><pre>8<br /></pre></div><div class="input"><div class="title">Input</div><pre>4 10<br />4 3 2 1<br /></pre></div><div class="output"><div class="title">Output</div><pre>10<br /></pre></div><div class="input"><div class="title">Input</div><pre>4 10<br />4 2 3 1<br /></pre></div><div class="output"><div class="title">Output</div><pre>15<br /></pre></div></div></div></div></div>
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+                            Codeforces.putToStorageTtl(uuid, statementText, 6 * 60 * 60);
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+                        $problem.find("a.view-changes").click(function() {
+                            $.post("/data/diff", {action: "getDiff", a: previousStatementText, b: statementText}, function (result) {
+                                if (result["success"] === "true") {
+                                    Codeforces.facebox(".diff-popup", "//codeforces.org/s/14919");
+                                    $("#facebox .diff-popup").html(result["diff"]);
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+                    Codeforces.putToStorageTtl(uuid, statementText, 6 * 60 * 60);
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+        <div
+                    style="margin-bottom: 2em;"
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+
+
+<div class="problemindexholder" problemindex="C" data-uuid="ps_5dacd700641ff8e7537eb3f5d2b86ba9683a2450">
+    <div style="display: none; margin:1em 0;text-align: center; position: relative;" class="alert alert-info diff-notifier">
+        <div>The problem statement has recently been changed. <a class="view-changes" href="#">View the changes.</a></div>
+        <span class="diff-notifier-close" style="position: absolute; top: 0.2em; right: 0.3em; cursor: pointer; font-size: 1.4em;">&times;</span>
+    </div>
+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">C. Email address</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Sometimes one has to spell email addresses over the phone. Then one usually pronounces a dot as <span class="tex-font-style-tt">dot</span>, an at sign as <span class="tex-font-style-tt">at</span>. As a result, we get something like <span class="tex-font-style-tt">vasyaatgmaildotcom</span>. Your task is to transform it into a proper email address (<a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="671106141e0627000a060e0b4904080a">[email&#160;protected]</a>). </p><p>It is known that a proper email address contains only such symbols as <span class="tex-font-style-tt">.</span> <span class="tex-font-style-tt">@</span> and lower-case Latin letters, doesn't start with and doesn't end with a dot. Also, a proper email address doesn't start with and doesn't end with an at sign. Moreover, an email address contains exactly one such symbol as <span class="tex-font-style-tt">@</span>, yet may contain any number (possible, zero) of dots. </p><p>You have to carry out a series of replacements so that the length of the result was as short as possible and it was a proper email address. If the lengths are equal, you should print the lexicographically minimal result. </p><p>Overall, two variants of replacement are possible: <span class="tex-font-style-tt">dot</span> can be replaced by a dot, <span class="tex-font-style-tt">at</span> can be replaced by an at. </p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains the email address description. It is guaranteed that that is a proper email address with all the dots replaced by <span class="tex-font-style-tt">dot</span> an the at signs replaced by <span class="tex-font-style-tt">at</span>. The line is not empty and its length does not exceed 100 symbols.</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print the shortest email address, from which the given line could be made by the described above replacements. If there are several solutions to that problem, print the lexicographically minimal one (the lexicographical comparison of the lines are implemented with an operator &lt; in modern programming languages).</p><p>In the ASCII table the symbols go in this order: <span class="tex-font-style-tt">. @ ab</span>...<span class="tex-font-style-tt">z</span></p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>vasyaatgmaildotcom<br /></pre></div><div class="output"><div class="title">Output</div><pre><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="6f190e1c160e2f08020e0603410c0002">[email&#160;protected]</a><br /></pre></div><div class="input"><div class="title">Input</div><pre>dotdotdotatdotdotat<br /></pre></div><div class="output"><div class="title">Output</div><pre><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="14707b603a3a543a3a7560">[email&#160;protected]</a><br /></pre></div><div class="input"><div class="title">Input</div><pre>aatt<br /></pre></div><div class="output"><div class="title">Output</div><pre><a href="/cdn-cgi/l/email-protection" class="__cf_email__" data-cfemail="4f2e0f3b">[email&#160;protected]</a><br /></pre></div></div></div></div></div>
+</div>
+
+    <script data-cfasync="false" src="/cdn-cgi/scripts/5c5dd728/cloudflare-static/email-decode.min.js"></script><script>
+        $(function () {
+            Codeforces.addMathJaxListener(function () {
+                let $problem = $("div[problemindex=C]");
+                let uuid = $problem.attr("data-uuid");
+                let statementText = convertStatementToText($problem.find(".ttypography").get(0));
+
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+
+                        $problem.find("a.view-changes").click(function() {
+                            $.post("/data/diff", {action: "getDiff", a: previousStatementText, b: statementText}, function (result) {
+                                if (result["success"] === "true") {
+                                    Codeforces.facebox(".diff-popup", "//codeforces.org/s/14919");
+                                    $("#facebox .diff-popup").html(result["diff"]);
+                                }
+                            }, "json");
+                        });
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+                } else {
+                    Codeforces.putToStorageTtl(uuid, statementText, 6 * 60 * 60);
+                }
+            });
+        });
+    </script>
+
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+    $(document).ready(function () {
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+            return string.indexOf(suffix, string.length - suffix.length) !== -1;
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+
+
+
+
+    });
+</script>
+        </div>
+        <div
+                    style="margin-bottom: 2em;"
+        >
+
+
+<div class="problemindexholder" problemindex="D" data-uuid="ps_db9dbdb1dbc1624c112ba8c90a3f4e35041ab000">
+    <div style="display: none; margin:1em 0;text-align: center; position: relative;" class="alert alert-info diff-notifier">
+        <div>The problem statement has recently been changed. <a class="view-changes" href="#">View the changes.</a></div>
+        <span class="diff-notifier-close" style="position: absolute; top: 0.2em; right: 0.3em; cursor: pointer; font-size: 1.4em;">&times;</span>
+    </div>
+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">D. Pawn</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>On some square in the lowest row of a chessboard a stands a pawn. It has only two variants of moving: upwards and leftwards or upwards and rightwards. The pawn can choose from which square of the lowest row it can start its journey. On each square lay from 0 to 9 peas. The pawn wants to reach the uppermost row having collected as many peas as possible. As there it will have to divide the peas between itself and its <span class="tex-span"><i>k</i></span> brothers, the number of peas must be divisible by <span class="tex-span"><i>k</i> + 1</span>. Find the maximal number of peas it will be able to collect and which moves it should make to do it.</p><p>The pawn cannot throw peas away or leave the board. When a pawn appears in some square of the board (including the first and last square of the way), it necessarily takes all the peas.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains three integers <span class="tex-span"><i>n</i></span>, <span class="tex-span"><i>m</i></span>, <span class="tex-span"><i>k</i></span> (<span class="tex-span">2 ≤ <i>n</i>, <i>m</i> ≤ 100, 0 ≤ <i>k</i> ≤ 10</span>) — the number of rows and columns on the chessboard, the number of the pawn's brothers. Then follow <span class="tex-span"><i>n</i></span> lines containing each <span class="tex-span"><i>m</i></span> numbers from 0 to 9 without spaces — the chessboard's description. Each square is described by one number — the number of peas in it. The first line corresponds to the uppermost row and the last line — to the lowest row.</p></div><div class="output-specification"><div class="section-title">Output</div><p>If it is impossible to reach the highest row having collected the number of peas divisible by <span class="tex-span"><i>k</i> + 1</span>, print <span class="tex-font-style-tt">-1</span>. </p><p>Otherwise, the first line must contain a single number — the maximal number of peas the pawn can collect given that the number must be divisible by <span class="tex-span"><i>k</i> + 1</span>. The second line must contain a single number — the number of the square's column in the lowest row, from which the pawn must start its journey. The columns are numbered from the left to the right with integral numbers starting from <span class="tex-span">1</span>. The third line must contain a line consisting of <span class="tex-span"><i>n</i> - 1</span> symbols — the description of the pawn's moves. If the pawn must move upwards and leftwards, print <span class="tex-font-style-tt">L</span>, if it must move upwards and rightwards, print <span class="tex-font-style-tt">R</span>. If there are several solutions to that problem, print any of them.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>3 3 1<br />123<br />456<br />789<br /></pre></div><div class="output"><div class="title">Output</div><pre>16<br />2<br />RL<br /></pre></div><div class="input"><div class="title">Input</div><pre>3 3 0<br />123<br />456<br />789<br /></pre></div><div class="output"><div class="title">Output</div><pre>17<br />3<br />LR<br /></pre></div><div class="input"><div class="title">Input</div><pre>2 2 10<br />98<br />75<br /></pre></div><div class="output"><div class="title">Output</div><pre>-1<br /></pre></div></div></div></div></div>
+</div>
+
+    <script>
+        $(function () {
+            Codeforces.addMathJaxListener(function () {
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+                let statementText = convertStatementToText($problem.find(".ttypography").get(0));
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+                let previousStatementText = Codeforces.getFromStorage(uuid);
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+                    if (previousStatementText !== statementText) {
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+                        $problem.find(".diff-notifier-close").click(function() {
+                            Codeforces.putToStorageTtl(uuid, statementText, 6 * 60 * 60);
+                            $problem.find(".diff-notifier").hide();
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+                        $problem.find("a.view-changes").click(function() {
+                            $.post("/data/diff", {action: "getDiff", a: previousStatementText, b: statementText}, function (result) {
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+                                    Codeforces.facebox(".diff-popup", "//codeforces.org/s/14919");
+                                    $("#facebox .diff-popup").html(result["diff"]);
+                                }
+                            }, "json");
+                        });
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+                    Codeforces.putToStorageTtl(uuid, statementText, 6 * 60 * 60);
+                }
+            });
+        });
+    </script>
+
+
+<script type="text/javascript">
+    $(document).ready(function () {
+
+        function endsWith(string, suffix) {
+            return string.indexOf(suffix, string.length - suffix.length) !== -1;
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+        const inputFile = inputFileDiv.text();
+        const outputFileDiv = $("div.output-file");
+        const outputFile = outputFileDiv.text();
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+
+
+
+
+    });
+</script>
+        </div>
+        <div
+                    style="margin-bottom: 1em;"
+        >
+
+
+<div class="problemindexholder" problemindex="E" data-uuid="ps_0d3029e271df48120854052404ee08fd5fa41579">
+    <div style="display: none; margin:1em 0;text-align: center; position: relative;" class="alert alert-info diff-notifier">
+        <div>The problem statement has recently been changed. <a class="view-changes" href="#">View the changes.</a></div>
+        <span class="diff-notifier-close" style="position: absolute; top: 0.2em; right: 0.3em; cursor: pointer; font-size: 1.4em;">&times;</span>
+    </div>
+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">E. 3-cycles</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>During a recent research Berland scientists found out that there were <span class="tex-span"><i>n</i></span> cities in Ancient Berland, joined by two-way paths. Any two cities are joined by no more than one path. No path joins a city with itself. According to a well-known tradition, the road network was built so that it would be impossible to choose three cities from each of which one can get to any other one directly. That is, there was no cycle exactly as long as 3. Unfortunately, the road map has not been preserved till nowadays. Now the scientists are interested how much developed a country Ancient Berland was. Help them - find, what maximal number of roads could be in the country. You also have to restore any of the possible road maps.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains an integer <span class="tex-span"><i>n</i></span> (<span class="tex-span">1 ≤ <i>n</i> ≤ 100</span>) — the number of cities in Berland.</p></div><div class="output-specification"><div class="section-title">Output</div><p>On the first line must be printed number <span class="tex-span"><i>m</i></span> — the maximal number of roads in Berland. Then print <span class="tex-span"><i>m</i></span> lines containing two numbers each — the numbers of cities that the given road joins. The cities are numbered with integers from <span class="tex-span">1</span> to <span class="tex-span"><i>n</i></span>. If there are several variants of solving the problem, print any of them.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>3<br /></pre></div><div class="output"><div class="title">Output</div><pre>2<br />1 2<br />2 3<br /></pre></div><div class="input"><div class="title">Input</div><pre>4<br /></pre></div><div class="output"><div class="title">Output</div><pre>4<br />1 2<br />2 3<br />3 4<br />4 1<br /></pre></div></div></div></div></div>
+</div>
+
+    <script>
+        $(function () {
+            Codeforces.addMathJaxListener(function () {
+                let $problem = $("div[problemindex=E]");
+                let uuid = $problem.attr("data-uuid");
+                let statementText = convertStatementToText($problem.find(".ttypography").get(0));
+
+                let previousStatementText = Codeforces.getFromStorage(uuid);
+                if (previousStatementText) {
+                    if (previousStatementText !== statementText) {
+                        $problem.find(".diff-notifier").show();
+
+                        $problem.find(".diff-notifier-close").click(function() {
+                            Codeforces.putToStorageTtl(uuid, statementText, 6 * 60 * 60);
+                            $problem.find(".diff-notifier").hide();
+                        });
+
+                        $problem.find("a.view-changes").click(function() {
+                            $.post("/data/diff", {action: "getDiff", a: previousStatementText, b: statementText}, function (result) {
+                                if (result["success"] === "true") {
+                                    Codeforces.facebox(".diff-popup", "//codeforces.org/s/14919");
+                                    $("#facebox .diff-popup").html(result["diff"]);
+                                }
+                            }, "json");
+                        });
+                    }
+                } else {
+                    Codeforces.putToStorageTtl(uuid, statementText, 6 * 60 * 60);
+                }
+            });
+        });
+    </script>
+
+
+<script type="text/javascript">
+    $(document).ready(function () {
+
+        function endsWith(string, suffix) {
+            return string.indexOf(suffix, string.length - suffix.length) !== -1;
+        }
+
+        const inputFileDiv = $("div.input-file");
+        const inputFile = inputFileDiv.text();
+        const outputFileDiv = $("div.output-file");
+        const outputFile = outputFileDiv.text();
+
+
+        if (!endsWith(inputFile, "standard input")
+            && !endsWith(inputFile, "standard input")) {
+            inputFileDiv.attr("style", "font-weight: bold");
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+            && !endsWith(outputFile, "standard output")) {
+            outputFileDiv.attr("style", "font-weight: bold");
+        }
+
+        const titleDiv = $("div.header div.title");
+
+
+
+
+    });
+</script>
+        </div>
+    </div>
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+<script>(function(){var js = "window['__CF$cv$params']={r:'7e4a78eb99adb38f',m:'o5c.HR3E2zMmZvOZCL5NM1U8g5J8gv.LQ0bjaze.QBE-1689009574-0-Acoc0NfA/uVr0uXCmTVgfA3IMHKdS42sf1bLEKlSQtWH'};_cpo=document.createElement('script');_cpo.nonce='',_cpo.src='/cdn-cgi/challenge-platform/scripts/invisible.js',document.getElementsByTagName('head')[0].appendChild(_cpo);";var _0xh = document.createElement('iframe');_0xh.height = 1;_0xh.width = 1;_0xh.style.position = 'absolute';_0xh.style.top = 0;_0xh.style.left = 0;_0xh.style.border = 'none';_0xh.style.visibility = 'hidden';document.body.appendChild(_0xh);function handler() {var _0xi = _0xh.contentDocument || _0xh.contentWindow.document;if (_0xi) {var _0xj = _0xi.createElement('script');_0xj.nonce = '';_0xj.innerHTML = js;_0xi.getElementsByTagName('head')[0].appendChild(_0xj);}}if (document.readyState !== 'loading') {handler();} else if (window.addEventListener) {document.addEventListener('DOMContentLoaded', handler);} else {var prev = document.onreadystatechange || function () {};document.onreadystatechange = function (e) {prev(e);if (document.readyState !== 'loading') {document.onreadystatechange = prev;handler();}};}})();</script></body>
+</html>
 2023-07-19 21:29:38 +02:00
Matej Focko
30124b649f
116(A,cpp): solve “Tram” 
Signed-off-by: Matej Focko <mfocko@redhat.com>

diff --git a/116/a.cpp b/116/a.cpp
new file mode 100644
index 0000000..30abd15
--- /dev/null
+++ b/116/a.cpp
@@ -0,0 +1,108 @@
+#include <algorithm>
+#include <cassert>
+#include <cctype>
+#include <cstdint>
+#include <functional>
+#include <iostream>
+#include <optional>
+#include <sstream>
+#include <string>
+#include <vector>
+
+namespace helpers {
+
+using namespace std;
+
+long pow(long base, long exp) {
+  if (exp == 0) return 1;
+  long half = pow(base, exp / 2);
+  if (exp % 2 == 0) return half * half;
+  return half * half * base;
+}
+
+#define LOOP(n) for (auto i = 0; i < n; ++i)
+
+template <typename T>
+inline void answer(const T& ans) {
+  cout << ans << "\n";
+}
+
+inline void yes() { cout << "YES\n"; }
+inline void no() { cout << "NO\n"; }
+
+}  // namespace helpers
+
+namespace {
+
+using namespace std;
+using namespace helpers;
+
+struct stop {
+  int exit;
+  int entry;
+};
+
+int min_capacity(const std::vector<stop>& stops) {
+  int current = 0;
+  int min_cap = 0;
+
+  for (const auto& s : stops) {
+    current += (s.entry - s.exit);
+    min_cap = max(min_cap, current);
+  }
+
+  return min_cap;
+}
+
+void solve() {
+  int N;
+  cin >> N;
+
+  std::vector<stop> stops;
+  LOOP(N) {
+    int exit, entry;
+    cin >> exit >> entry;
+
+    stops.push_back({exit, entry});
+  }
+
+  answer(min_capacity(stops));
+}
+
+}  // namespace
+
+// for single test case, comment out for ‹N› test cases
+#define SINGLE
+
+#ifdef TEST
+
+#include "../.common/cpp/catch_amalgamated.hpp"
+
+TEST_CASE("examples") {
+  CHECK(min_capacity(std::vector<stop>{{0, 3}, {2, 5}, {4, 2}, {4, 0}}) == 6);
+}
+
+#else
+
+int main(void) {
+
+#ifdef SINGLE
+
+  solve();
+
+#else
+
+  // for multiple test cases
+  int N;
+  std::cin >> N >> std::ws;
+
+  for (auto i = 0; i < N; ++i) {
+    solve();
+  }
+
+#endif
+
+  return 0;
+}
+
+#endif
diff --git a/116/index.html b/116/index.html
new file mode 100644
index 0000000..5a103b3
--- /dev/null
+++ b/116/index.html
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">A. Tram</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Linear Kingdom has exactly one tram line. It has <span class="tex-span"><i>n</i></span> stops, numbered from <span class="tex-span">1</span> to <span class="tex-span"><i>n</i></span> in the order of tram's movement. At the <span class="tex-span"><i>i</i></span>-th stop <span class="tex-span"><i>a</i><sub class="lower-index"><i>i</i></sub></span> passengers exit the tram, while <span class="tex-span"><i>b</i><sub class="lower-index"><i>i</i></sub></span> passengers enter it. The tram is empty before it arrives at the first stop. Also, when the tram arrives at the last stop, all passengers exit so that it becomes empty.</p><p>Your task is to calculate the tram's minimum capacity such that the number of people inside the tram at any time never exceeds this capacity. Note that at each stop all exiting passengers exit <span class="tex-font-style-bf">before</span> any entering passenger enters the tram.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains a single number <span class="tex-span"><i>n</i></span> (<span class="tex-span">2 ≤ <i>n</i> ≤ 1000</span>) — the number of the tram's stops. </p><p>Then <span class="tex-span"><i>n</i></span> lines follow, each contains two integers <span class="tex-span"><i>a</i><sub class="lower-index"><i>i</i></sub></span> and <span class="tex-span"><i>b</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">0 ≤ <i>a</i><sub class="lower-index"><i>i</i></sub>, <i>b</i><sub class="lower-index"><i>i</i></sub> ≤ 1000</span>) — the number of passengers that exits the tram at the <span class="tex-span"><i>i</i></span>-th stop, and the number of passengers that enter the tram at the <span class="tex-span"><i>i</i></span>-th stop. The stops are given from the first to the last stop in the order of tram's movement.</p><ul> <li> The number of people who exit at a given stop does not exceed the total number of people in the tram immediately before it arrives at the stop. More formally, <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/eb1e20fd58cc4373d8f42eb7e743d3ea232d1a19.png" style="max-width: 100.0%;max-height: 100.0%;" />. This particularly means that <span class="tex-span"><i>a</i><sub class="lower-index">1</sub> = 0</span>. </li><li> At the last stop, <span class="tex-font-style-bf">all</span> the passengers exit the tram and it becomes empty. More formally, <img align="middle" class="tex-formula" src="https://espresso.codeforces.com/8cbe43ecd252bf7d670f9a3956cbe50263d2f09b.png" style="max-width: 100.0%;max-height: 100.0%;" />. </li><li> No passenger will enter the train at the last stop. That is, <span class="tex-span"><i>b</i><sub class="lower-index"><i>n</i></sub> = 0</span>. </li></ul></div><div class="output-specification"><div class="section-title">Output</div><p>Print a single integer denoting the minimum possible capacity of the tram (0 is allowed).</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>4<br />0 3<br />2 5<br />4 2<br />4 0<br /></pre></div><div class="output"><div class="title">Output</div><pre>6<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>For the first example, a capacity of 6 is sufficient: </p><ul> <li> At the first stop, the number of passengers inside the tram before arriving is 0. Then, 3 passengers enter the tram, and the number of passengers inside the tram becomes 3. </li><li> At the second stop, 2 passengers exit the tram (1 passenger remains inside). Then, 5 passengers enter the tram. There are 6 passengers inside the tram now. </li><li> At the third stop, 4 passengers exit the tram (2 passengers remain inside). Then, 2 passengers enter the tram. There are 4 passengers inside the tram now. </li><li> Finally, all the remaining passengers inside the tram exit the tram at the last stop. There are no passenger inside the tram now, which is in line with the constraints. </li></ul><p>Since the number of passengers inside the tram never exceeds 6, a capacity of 6 is sufficient. Furthermore it is not possible for the tram to have a capacity less than 6. Hence, 6 is the correct answer.</p></div></div></div>
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">B. Little Pigs and Wolves</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Once upon a time there were several little pigs and several wolves on a two-dimensional grid of size <span class="tex-span"><i>n</i> × <i>m</i></span>. Each cell in this grid was either empty, containing one little pig, or containing one wolf.</p><p>A little pig and a wolf are adjacent if the cells that they are located at share a side. The little pigs are afraid of wolves, so there will be at most one wolf adjacent to each little pig. But each wolf may be adjacent to any number of little pigs.</p><p>They have been living peacefully for several years. But today the wolves got hungry. One by one, each wolf will choose one of the little pigs adjacent to it (if any), and eats the poor little pig. This process is not repeated. That is, each wolf will get to eat at most one little pig. Once a little pig gets eaten, it disappears and cannot be eaten by any other wolf.</p><p>What is the maximum number of little pigs that may be eaten by the wolves?</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains integers <span class="tex-span"><i>n</i></span> and <span class="tex-span"><i>m</i></span> (<span class="tex-span">1 ≤ <i>n</i>, <i>m</i> ≤ 10</span>) which denotes the number of rows and columns in our two-dimensional grid, respectively. Then follow <span class="tex-span"><i>n</i></span> lines containing <span class="tex-span"><i>m</i></span> characters each — that is the grid description. &quot;<span class="tex-font-style-tt">.</span>&quot; means that this cell is empty. &quot;<span class="tex-font-style-tt">P</span>&quot; means that this cell contains a little pig. &quot;<span class="tex-font-style-tt">W</span>&quot; means that this cell contains a wolf. </p><p>It is guaranteed that there will be at most one wolf adjacent to any little pig.</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print a single number — the maximal number of little pigs that may be eaten by the wolves.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>2 3<br />PPW<br />W.P<br /></pre></div><div class="output"><div class="title">Output</div><pre>2<br /></pre></div><div class="input"><div class="title">Input</div><pre>3 3<br />P.W<br />.P.<br />W.P<br /></pre></div><div class="output"><div class="title">Output</div><pre>0<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>In the first example, one possible scenario in which two little pigs get eaten by the wolves is as follows. </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/8b2d8a71336740ed4c66ef13db59d065aaacdb99.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center></div></div></div>
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+    <div style="display: none; margin:1em 0;text-align: center; position: relative;" class="alert alert-info diff-notifier">
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">C. Party</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>A company has <span class="tex-span"><i>n</i></span> employees numbered from <span class="tex-span">1</span> to <span class="tex-span"><i>n</i></span>. Each employee either has no immediate manager or exactly one immediate manager, who is another employee with a different number. An employee <span class="tex-span"><i>A</i></span> is said to be the <span class="tex-font-style-underline">superior</span> of another employee <span class="tex-span"><i>B</i></span> if at least one of the following is true:</p><ul> <li> Employee <span class="tex-span"><i>A</i></span> is the immediate manager of employee <span class="tex-span"><i>B</i></span> </li><li> Employee <span class="tex-span"><i>B</i></span> has an immediate manager employee <span class="tex-span"><i>C</i></span> such that employee <span class="tex-span"><i>A</i></span> is the superior of employee <span class="tex-span"><i>C</i></span>. </li></ul><p>The company will not have a managerial cycle. That is, there will not exist an employee who is the superior of his/her own immediate manager.</p><p>Today the company is going to arrange a party. This involves dividing all <span class="tex-span"><i>n</i></span> employees into several groups: every employee must belong to exactly one group. Furthermore, within any single group, there must not be two employees <span class="tex-span"><i>A</i></span> and <span class="tex-span"><i>B</i></span> such that <span class="tex-span"><i>A</i></span> is the superior of <span class="tex-span"><i>B</i></span>.</p><p>What is the minimum number of groups that must be formed?</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains integer <span class="tex-span"><i>n</i></span> (<span class="tex-span">1 ≤ <i>n</i> ≤ 2000</span>) — the number of employees.</p><p>The next <span class="tex-span"><i>n</i></span> lines contain the integers <span class="tex-span"><i>p</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">1 ≤ <i>p</i><sub class="lower-index"><i>i</i></sub> ≤ <i>n</i></span> or <span class="tex-span"><i>p</i><sub class="lower-index"><i>i</i></sub> = </span>-1). Every <span class="tex-span"><i>p</i><sub class="lower-index"><i>i</i></sub></span> denotes the immediate manager for the <span class="tex-span"><i>i</i></span>-th employee. If <span class="tex-span"><i>p</i><sub class="lower-index"><i>i</i></sub></span> is -1, that means that the <span class="tex-span"><i>i</i></span>-th employee does not have an immediate manager. </p><p>It is guaranteed, that no employee will be the immediate manager of him/herself (<span class="tex-span"><i>p</i><sub class="lower-index"><i>i</i></sub> ≠ <i>i</i></span>). Also, there will be no managerial cycles.</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print a single integer denoting the minimum number of groups that will be formed in the party.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>5<br />-1<br />1<br />2<br />1<br />-1<br /></pre></div><div class="output"><div class="title">Output</div><pre>3<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>For the first example, three groups are sufficient, for example: </p><ul> <li> Employee 1 </li><li> Employees 2 and 4 </li><li> Employees 3 and 5 </li></ul></div></div></div>
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">D. Lawnmower</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>You have a garden consisting entirely of grass and weeds. Your garden is described by an <span class="tex-span"><i>n</i> × <i>m</i></span> grid, with rows numbered <span class="tex-span">1</span> to <span class="tex-span"><i>n</i></span> from top to bottom, and columns <span class="tex-span">1</span> to <span class="tex-span"><i>m</i></span> from left to right. Each cell is identified by a pair <span class="tex-span">(<i>r</i>, <i>c</i>)</span> which means that the cell is located at row <span class="tex-span"><i>r</i></span> and column <span class="tex-span"><i>c</i></span>. Each cell may contain either grass or weeds. For example, a <span class="tex-span">4 × 5</span> garden may look as follows (empty cells denote grass):</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/50eb313baaf29ad5684e742751bccc46a2b5445b.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>You have a land-mower with you to mow all the weeds. Initially, you are standing with your lawnmower at the top-left corner of the garden. That is, at cell <span class="tex-span">(1, 1)</span>. At any moment of time you are facing a certain direction — either left or right. And initially, you face right.</p><p>In one move you can do either one of these:</p><p>1) Move one cell in the direction that you are facing.</p><ul><p> </p><li> if you are facing right: move from cell <span class="tex-span">(<i>r</i>, <i>c</i>)</span> to cell <span class="tex-span">(<i>r</i>, <i>c</i> + 1)</span><p> </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/c276e1bed94be3719d1c66b91ee47c682881a1a1.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p> </p></li><li> if you are facing left: move from cell <span class="tex-span">(<i>r</i>, <i>c</i>)</span> to cell <span class="tex-span">(<i>r</i>, <i>c</i> - 1)</span><p> </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/db006bc9e0faafd4c87d6af4370af935b196c207.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center></li></ul> 2) Move one cell down (that is, from cell <span class="tex-span">(<i>r</i>, <i>c</i>)</span> to cell <span class="tex-span">(<i>r</i> + 1, <i>c</i>)</span>), and change your direction to the opposite one.<ul><p> </p><li> if you were facing right previously, you will face left<p> </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/6419636d10a92c8e4e1a225909f27a8d288a9e6a.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p> </p></li><li> if you were facing left previously, you will face right<p> </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/8235e5e624726e6623d22e8e7de53a91868abfac.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center> </li></ul><p>You are not allowed to leave the garden. Weeds will be mowed if you and your lawnmower are standing at the cell containing the weeds (your direction doesn't matter). This action isn't counted as a move.</p><p>What is the minimum number of moves required to mow all the weeds?</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line contains two integers <span class="tex-span"><i>n</i></span> and <span class="tex-span"><i>m</i></span> (<span class="tex-span">1 ≤ <i>n</i>, <i>m</i> ≤ 150</span>) — the number of rows and columns respectively. Then follow <span class="tex-span"><i>n</i></span> lines containing <span class="tex-span"><i>m</i></span> characters each — the content of the grid. &quot;<span class="tex-font-style-tt">G</span>&quot; means that this cell contains grass. &quot;<span class="tex-font-style-tt">W</span>&quot; means that this cell contains weeds. </p><p>It is guaranteed that the top-left corner of the grid will contain grass.</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print a single number — the minimum number of moves required to mow all the weeds.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>4 5<br />GWGGW<br />GGWGG<br />GWGGG<br />WGGGG<br /></pre></div><div class="output"><div class="title">Output</div><pre>11<br /></pre></div><div class="input"><div class="title">Input</div><pre>3 3<br />GWW<br />WWW<br />WWG<br /></pre></div><div class="output"><div class="title">Output</div><pre>7<br /></pre></div><div class="input"><div class="title">Input</div><pre>1 1<br />G<br /></pre></div><div class="output"><div class="title">Output</div><pre>0<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>For the first example, this is the picture of the initial state of the grid:</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/7d962d3c57565b1f285036e43348e3382d156169.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>A possible solution is by mowing the weeds as illustrated below:</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/6f352e6c8e92492cca3507ca4252f53da66f4a4e.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center></div></div></div>
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">E. Plumber</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Little John aspires to become a plumber! Today he has drawn a grid consisting of <span class="tex-span"><i>n</i></span> rows and <span class="tex-span"><i>m</i></span> columns, consisting of <span class="tex-span"><i>n</i> × <i>m</i></span> square cells.</p><p>In each cell he will draw a pipe segment. He can only draw four types of segments numbered from <span class="tex-span">1</span> to <span class="tex-span">4</span>, illustrated as follows:</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/fcfb2cc0f6b4d5dd758913f8ec0ffb75e2537626.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>Each pipe segment has two ends, illustrated by the arrows in the picture above. For example, segment <span class="tex-span">1</span> has ends at top and left side of it.</p><p>Little John considers the piping system to be leaking if there is at least one pipe segment inside the grid whose end is not connected to another pipe's end or to the border of the grid. The image below shows an example of leaking and non-leaking systems of size <span class="tex-span">1 × 2</span>.</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/a594e2ebc9562badc419e9ab0d9cd2d633f349ae.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>Now, you will be given the grid that has been partially filled by Little John. Each cell will either contain one of the four segments above, or be empty. Find the number of possible different non-leaking final systems after Little John finishes filling <span class="tex-font-style-bf">all</span> of the empty cells with pipe segments. Print this number modulo <span class="tex-span">1000003</span> (<span class="tex-span">10<sup class="upper-index">6</sup> + 3</span>).</p><p>Note that rotations or flipping of the grid are not allowed and so two configurations that are identical only when one of them has been rotated or flipped either horizontally or vertically are considered two different configurations.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line will contain two single-space separated integers <span class="tex-span"><i>n</i></span> and <span class="tex-span"><i>m</i></span> (<span class="tex-span">1 ≤ <i>n</i>, <i>m</i>, <i>n</i>·<i>m</i> ≤ 5·10<sup class="upper-index">5</sup></span>) — the number of rows and columns respectively. Then <span class="tex-span"><i>n</i></span> lines follow, each contains exactly <span class="tex-span"><i>m</i></span> characters — the description of the grid. Each character describes a cell and is either one of these: </p><ul> <li> &quot;<span class="tex-font-style-tt">1</span>&quot; - &quot;<span class="tex-font-style-tt">4</span>&quot; — a pipe segment of one of four types as described above </li><li> &quot;<span class="tex-font-style-tt">.</span>&quot; — an empty cell </li></ul></div><div class="output-specification"><div class="section-title">Output</div><p>Print a single integer denoting the number of possible final non-leaking pipe systems modulo <span class="tex-span">1000003</span> (<span class="tex-span">10<sup class="upper-index">6</sup> + 3</span>). If there are no such configurations, print <span class="tex-span">0</span>.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>2 2<br />13<br />..<br /></pre></div><div class="output"><div class="title">Output</div><pre>2<br /></pre></div><div class="input"><div class="title">Input</div><pre>3 1<br />1<br />4<br />.<br /></pre></div><div class="output"><div class="title">Output</div><pre>0<br /></pre></div><div class="input"><div class="title">Input</div><pre>2 2<br />3.<br />.1<br /></pre></div><div class="output"><div class="title">Output</div><pre>1<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>For the first example, the initial configuration of the grid is as follows. </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/c14a207fc0187825d452abc5f1a87ec5379b2680.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>The only two possible final non-leaking pipe configurations are as follows:</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/648283013db802bf02f0752ea7f9ef7690862b89.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><center> <img class="tex-graphics" src="https://espresso.codeforces.com/953c21a6a995b9db2a092bc26f81b7270aec7887.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>For the second example, the initial grid is already leaking, so there will be no final grid that is non-leaking.</p><p>For the final example, there's only one possible non-leaking final grid as follows.</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/799e3f21b4092831e14c01a445eaa6848dba1240.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center></div></div></div>
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+</html>
 2023-07-19 20:22:15 +02:00
Matej Focko
7a2374a1c6
734(A,cpp): solve “Anton and Danik” 
Signed-off-by: Matej Focko <me@mfocko.xyz>

diff --git a/734/a.cpp b/734/a.cpp
new file mode 100644
index 0000000..8b7aa0e
--- /dev/null
+++ b/734/a.cpp
@@ -0,0 +1,111 @@
+#include <algorithm>
+#include <cassert>
+#include <cctype>
+#include <cstdint>
+#include <functional>
+#include <iostream>
+#include <optional>
+#include <sstream>
+#include <string>
+#include <vector>
+
+namespace helpers {
+
+using namespace std;
+
+long pow(long base, long exp) {
+  if (exp == 0) return 1;
+  long half = pow(base, exp / 2);
+  if (exp % 2 == 0) return half * half;
+  return half * half * base;
+}
+
+template <typename T>
+inline void answer(const T &ans) {
+  cout << ans << "\n";
+}
+
+inline void yes() { cout << "YES\n"; }
+inline void no() { cout << "NO\n"; }
+
+}  // namespace helpers
+
+namespace {
+
+using namespace std;
+using namespace helpers;
+
+enum result { anton, danik, tie };
+
+result who_won(const std::string &results) {
+  auto a = std::count(results.begin(), results.end(), 'A');
+  auto d = std::count(results.begin(), results.end(), 'D');
+
+  if (a == d) {
+    return result::tie;
+  }
+
+  return (a > d) ? result::anton : result::danik;
+}
+
+void solve() {
+  int N;
+  cin >> N;
+
+  std::string results;
+  cin >> results;
+
+  switch (who_won(results)) {
+    case result::anton:
+      answer("Anton");
+      break;
+    case result::danik:
+      answer("Danik");
+      break;
+    case result::tie:
+      answer("Friendship");
+      break;
+    default:
+      assert(false);
+  }
+}
+
+}  // namespace
+
+// for single test case, comment out for ‹N› test cases
+#define SINGLE
+
+#ifdef TEST
+
+#include "../.common/cpp/catch_amalgamated.hpp"
+
+TEST_CASE("examples") {
+  CHECK(who_won("ADAAAA") == result::anton);
+  CHECK(who_won("DDDAADA") == result::danik);
+  CHECK(who_won("DADADA") == result::tie);
+}
+
+#else
+
+int main(void) {
+
+#ifdef SINGLE
+
+  solve();
+
+#else
+
+  // for multiple test cases
+  int N;
+  std::cin >> N >> std::ws;
+
+  for (auto i = 0; i < N; ++i) {
+    solve();
+  }
+
+#endif
+
+  return 0;
+}
+
+#endif
diff --git a/734/index.html b/734/index.html
new file mode 100644
index 0000000..94e78a7
--- /dev/null
+++ b/734/index.html
@@ -0,0 +1,1113 @@
+
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">A. Anton and Danik</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Anton likes to play chess, and so does his friend Danik.</p><p>Once they have played <span class="tex-span"><i>n</i></span> games in a row. For each game it's known who was the winner — Anton or Danik. None of the games ended with a tie.</p><p>Now Anton wonders, who won more games, he or Danik? Help him determine this.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line of the input contains a single integer <span class="tex-span"><i>n</i></span> (<span class="tex-span">1 ≤ <i>n</i> ≤ 100 000</span>) — the number of games played.</p><p>The second line contains a string <span class="tex-span"><i>s</i></span>, consisting of <span class="tex-span"><i>n</i></span> uppercase English letters '<span class="tex-font-style-tt">A</span>' and '<span class="tex-font-style-tt">D</span>' — the outcome of each of the games. The <span class="tex-span"><i>i</i></span>-th character of the string is equal to '<span class="tex-font-style-tt">A</span>' if the Anton won the <span class="tex-span"><i>i</i></span>-th game and '<span class="tex-font-style-tt">D</span>' if Danik won the <span class="tex-span"><i>i</i></span>-th game.</p></div><div class="output-specification"><div class="section-title">Output</div><p>If Anton won more games than Danik, print &quot;<span class="tex-font-style-tt">Anton</span>&quot; (without quotes) in the only line of the output.</p><p>If Danik won more games than Anton, print &quot;<span class="tex-font-style-tt">Danik</span>&quot; (without quotes) in the only line of the output.</p><p>If Anton and Danik won the same number of games, print &quot;<span class="tex-font-style-tt">Friendship</span>&quot; (without quotes).</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>6<br />ADAAAA<br /></pre></div><div class="output"><div class="title">Output</div><pre>Anton<br /></pre></div><div class="input"><div class="title">Input</div><pre>7<br />DDDAADA<br /></pre></div><div class="output"><div class="title">Output</div><pre>Danik<br /></pre></div><div class="input"><div class="title">Input</div><pre>6<br />DADADA<br /></pre></div><div class="output"><div class="title">Output</div><pre>Friendship<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>In the first sample, Anton won <span class="tex-span">6</span> games, while Danik — only <span class="tex-span">1</span>. Hence, the answer is &quot;<span class="tex-font-style-tt">Anton</span>&quot;.</p><p>In the second sample, Anton won <span class="tex-span">3</span> games and Danik won <span class="tex-span">4</span> games, so the answer is &quot;<span class="tex-font-style-tt">Danik</span>&quot;.</p><p>In the third sample, both Anton and Danik won <span class="tex-span">3</span> games and the answer is &quot;<span class="tex-font-style-tt">Friendship</span>&quot;.</p></div></div><p>  </p></div>
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">B. Anton and Digits</div><div class="time-limit"><div class="property-title">time limit per test</div>1 second</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Recently Anton found a box with digits in his room. There are <span class="tex-span"><i>k</i><sub class="lower-index">2</sub></span> digits <span class="tex-span">2</span>, <span class="tex-span"><i>k</i><sub class="lower-index">3</sub></span> digits <span class="tex-span">3</span>, <span class="tex-span"><i>k</i><sub class="lower-index">5</sub></span> digits <span class="tex-span">5</span> and <span class="tex-span"><i>k</i><sub class="lower-index">6</sub></span> digits <span class="tex-span">6</span>.</p><p>Anton's favorite integers are <span class="tex-span">32</span> and <span class="tex-span">256</span>. He decided to compose this integers from digits he has. He wants to make the sum of these integers as large as possible. Help him solve this task!</p><p>Each digit can be used no more than once, i.e. the composed integers should contain no more than <span class="tex-span"><i>k</i><sub class="lower-index">2</sub></span> digits <span class="tex-span">2</span>, <span class="tex-span"><i>k</i><sub class="lower-index">3</sub></span> digits <span class="tex-span">3</span> and so on. Of course, unused digits are not counted in the sum.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The only line of the input contains four integers <span class="tex-span"><i>k</i><sub class="lower-index">2</sub></span>, <span class="tex-span"><i>k</i><sub class="lower-index">3</sub></span>, <span class="tex-span"><i>k</i><sub class="lower-index">5</sub></span> and <span class="tex-span"><i>k</i><sub class="lower-index">6</sub></span> — the number of digits <span class="tex-span">2</span>, <span class="tex-span">3</span>, <span class="tex-span">5</span> and <span class="tex-span">6</span> respectively (<span class="tex-span">0 ≤ <i>k</i><sub class="lower-index">2</sub>, <i>k</i><sub class="lower-index">3</sub>, <i>k</i><sub class="lower-index">5</sub>, <i>k</i><sub class="lower-index">6</sub> ≤ 5·10<sup class="upper-index">6</sup></span>).</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print one integer — maximum possible sum of Anton's favorite integers that can be composed using digits from the box.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>5 1 3 4<br /></pre></div><div class="output"><div class="title">Output</div><pre>800<br /></pre></div><div class="input"><div class="title">Input</div><pre>1 1 1 1<br /></pre></div><div class="output"><div class="title">Output</div><pre>256<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>In the first sample, there are five digits <span class="tex-span">2</span>, one digit <span class="tex-span">3</span>, three digits <span class="tex-span">5</span> and four digits <span class="tex-span">6</span>. Anton can compose three integers <span class="tex-span">256</span> and one integer <span class="tex-span">32</span> to achieve the value <span class="tex-span">256 + 256 + 256 + 32 = 800</span>. Note, that there is one unused integer <span class="tex-span">2</span> and one unused integer <span class="tex-span">6</span>. They are not counted in the answer.</p><p>In the second sample, the optimal answer is to create on integer <span class="tex-span">256</span>, thus the answer is <span class="tex-span">256</span>.</p></div></div><p>  </p></div>
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">C. Anton and Making Potions</div><div class="time-limit"><div class="property-title">time limit per test</div>4 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Anton is playing a very interesting computer game, but now he is stuck at one of the levels. To pass to the next level he has to prepare <span class="tex-span"><i>n</i></span> potions.</p><p>Anton has a special kettle, that can prepare one potions in <span class="tex-span"><i>x</i></span> seconds. Also, he knows spells of two types that can faster the process of preparing potions.</p><ol> <li> Spells of this type speed up the preparation time of one potion. There are <span class="tex-span"><i>m</i></span> spells of this type, the <span class="tex-span"><i>i</i></span>-th of them costs <span class="tex-span"><i>b</i><sub class="lower-index"><i>i</i></sub></span> manapoints and changes the preparation time of each potion to <span class="tex-span"><i>a</i><sub class="lower-index"><i>i</i></sub></span> instead of <span class="tex-span"><i>x</i></span>. </li><li> Spells of this type immediately prepare some number of potions. There are <span class="tex-span"><i>k</i></span> such spells, the <span class="tex-span"><i>i</i></span>-th of them costs <span class="tex-span"><i>d</i><sub class="lower-index"><i>i</i></sub></span> manapoints and instantly create <span class="tex-span"><i>c</i><sub class="lower-index"><i>i</i></sub></span> potions. </li></ol><p>Anton can use <span class="tex-font-style-bf">no more than one</span> spell of the first type and <span class="tex-font-style-bf">no more than one</span> spell of the second type, and the total number of manapoints spent should not exceed <span class="tex-span"><i>s</i></span>. Consider that all spells are used instantly and right before Anton starts to prepare potions.</p><p>Anton wants to get to the next level as fast as possible, so he is interested in the minimum number of time he needs to spent in order to prepare at least <span class="tex-span"><i>n</i></span> potions.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line of the input contains three integers <span class="tex-span"><i>n</i></span>, <span class="tex-span"><i>m</i></span>, <span class="tex-span"><i>k</i></span> (<span class="tex-span">1 ≤ <i>n</i> ≤ 2·10<sup class="upper-index">9</sup>, 1 ≤ <i>m</i>, <i>k</i> ≤ 2·10<sup class="upper-index">5</sup></span>) — the number of potions, Anton has to make, the number of spells of the first type and the number of spells of the second type.</p><p>The second line of the input contains two integers <span class="tex-span"><i>x</i></span> and <span class="tex-span"><i>s</i></span> (<span class="tex-span">2 ≤ <i>x</i> ≤ 2·10<sup class="upper-index">9</sup>, 1 ≤ <i>s</i> ≤ 2·10<sup class="upper-index">9</sup></span>) — the initial number of seconds required to prepare one potion and the number of manapoints Anton can use.</p><p>The third line contains <span class="tex-span"><i>m</i></span> integers <span class="tex-span"><i>a</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">1 ≤ <i>a</i><sub class="lower-index"><i>i</i></sub> &lt; <i>x</i></span>) — the number of seconds it will take to prepare one potion if the <span class="tex-span"><i>i</i></span>-th spell of the first type is used.</p><p>The fourth line contains <span class="tex-span"><i>m</i></span> integers <span class="tex-span"><i>b</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">1 ≤ <i>b</i><sub class="lower-index"><i>i</i></sub> ≤ 2·10<sup class="upper-index">9</sup></span>) — the number of manapoints to use the <span class="tex-span"><i>i</i></span>-th spell of the first type.</p><p>There are <span class="tex-span"><i>k</i></span> integers <span class="tex-span"><i>c</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">1 ≤ <i>c</i><sub class="lower-index"><i>i</i></sub> ≤ <i>n</i></span>) in the fifth line — the number of potions that will be immediately created if the <span class="tex-span"><i>i</i></span>-th spell of the second type is used. It's guaranteed that <span class="tex-span"><i>c</i><sub class="lower-index"><i>i</i></sub></span> are <span class="tex-font-style-bf">not decreasing</span>, i.e. <span class="tex-span"><i>c</i><sub class="lower-index"><i>i</i></sub> ≤ <i>c</i><sub class="lower-index"><i>j</i></sub></span> if <span class="tex-span"><i>i</i> &lt; <i>j</i></span>.</p><p>The sixth line contains <span class="tex-span"><i>k</i></span> integers <span class="tex-span"><i>d</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">1 ≤ <i>d</i><sub class="lower-index"><i>i</i></sub> ≤ 2·10<sup class="upper-index">9</sup></span>) — the number of manapoints required to use the <span class="tex-span"><i>i</i></span>-th spell of the second type. It's guaranteed that <span class="tex-span"><i>d</i><sub class="lower-index"><i>i</i></sub></span> are <span class="tex-font-style-bf">not decreasing</span>, i.e. <span class="tex-span"><i>d</i><sub class="lower-index"><i>i</i></sub> ≤ <i>d</i><sub class="lower-index"><i>j</i></sub></span> if <span class="tex-span"><i>i</i> &lt; <i>j</i></span>.</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print one integer — the minimum time one has to spent in order to prepare <span class="tex-span"><i>n</i></span> potions.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>20 3 2<br />10 99<br />2 4 3<br />20 10 40<br />4 15<br />10 80<br /></pre></div><div class="output"><div class="title">Output</div><pre>20<br /></pre></div><div class="input"><div class="title">Input</div><pre>20 3 2<br />10 99<br />2 4 3<br />200 100 400<br />4 15<br />100 800<br /></pre></div><div class="output"><div class="title">Output</div><pre>200<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>In the first sample, the optimum answer is to use the second spell of the first type that costs <span class="tex-span">10</span> manapoints. Thus, the preparation time of each potion changes to <span class="tex-span">4</span> seconds. Also, Anton should use the second spell of the second type to instantly prepare <span class="tex-span">15</span> potions spending <span class="tex-span">80</span> manapoints. The total number of manapoints used is <span class="tex-span">10 + 80 = 90</span>, and the preparation time is <span class="tex-span">4·5 = 20</span> seconds (<span class="tex-span">15</span> potions were prepared instantly, and the remaining <span class="tex-span">5</span> will take <span class="tex-span">4</span> seconds each).</p><p>In the second sample, Anton can't use any of the spells, so he just prepares <span class="tex-span">20</span> potions, spending <span class="tex-span">10</span> seconds on each of them and the answer is <span class="tex-span">20·10 = 200</span>.</p></div></div><p>  </p></div>
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+    <div style="display: none; margin:1em 0;text-align: center; position: relative;" class="alert alert-info diff-notifier">
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">D. Anton and Chess</div><div class="time-limit"><div class="property-title">time limit per test</div>4 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Anton likes to play chess. Also, he likes to do programming. That is why he decided to write the program that plays chess. However, he finds the game on <span class="tex-span">8</span> to <span class="tex-span">8</span> board to too simple, he uses an infinite one instead.</p><p>The first task he faced is to check whether the king is in check. Anton doesn't know how to implement this so he asks you to help.</p><p>Consider that an infinite chess board contains one white king and the number of black pieces. There are only rooks, bishops and queens, as the other pieces are not supported yet. The white king is said to be in check if at least one black piece can reach the cell with the king in one move. </p><p>Help Anton and write the program that for the given position determines whether the white king is in check.</p><p>Remainder, on how do chess pieces move: </p><ul> <li> Bishop moves any number of cells diagonally, but it can't &quot;leap&quot; over the occupied cells. </li><li> Rook moves any number of cells horizontally or vertically, but it also can't &quot;leap&quot; over the occupied cells. </li><li> Queen is able to move any number of cells horizontally, vertically or diagonally, but it also can't &quot;leap&quot;. </li></ul></div><div class="input-specification"><div class="section-title">Input</div><p>The first line of the input contains a single integer <span class="tex-span"><i>n</i></span> (<span class="tex-span">1 ≤ <i>n</i> ≤ 500 000</span>) — the number of black pieces.</p><p>The second line contains two integers <span class="tex-span"><i>x</i><sub class="lower-index">0</sub></span> and <span class="tex-span"><i>y</i><sub class="lower-index">0</sub></span> (<span class="tex-span"> - 10<sup class="upper-index">9</sup> ≤ <i>x</i><sub class="lower-index">0</sub>, <i>y</i><sub class="lower-index">0</sub> ≤ 10<sup class="upper-index">9</sup></span>) — coordinates of the white king.</p><p>Then follow <span class="tex-span"><i>n</i></span> lines, each of them contains a character and two integers <span class="tex-span"><i>x</i><sub class="lower-index"><i>i</i></sub></span> and <span class="tex-span"><i>y</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span"> - 10<sup class="upper-index">9</sup> ≤ <i>x</i><sub class="lower-index"><i>i</i></sub>, <i>y</i><sub class="lower-index"><i>i</i></sub> ≤ 10<sup class="upper-index">9</sup></span>) — type of the <span class="tex-span"><i>i</i></span>-th piece and its position. Character '<span class="tex-font-style-tt">B</span>' stands for the bishop, '<span class="tex-font-style-tt">R</span>' for the rook and '<span class="tex-font-style-tt">Q</span>' for the queen. It's guaranteed that no two pieces occupy the same position.</p></div><div class="output-specification"><div class="section-title">Output</div><p>The only line of the output should contains &quot;<span class="tex-font-style-tt">YES</span>&quot; (without quotes) if the white king is in check and &quot;<span class="tex-font-style-tt">NO</span>&quot; (without quotes) otherwise.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>2<br />4 2<br />R 1 1<br />B 1 5<br /></pre></div><div class="output"><div class="title">Output</div><pre>YES<br /></pre></div><div class="input"><div class="title">Input</div><pre>2<br />4 2<br />R 3 3<br />B 1 5<br /></pre></div><div class="output"><div class="title">Output</div><pre>NO<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>Picture for the first sample: </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/87d71a7f8b5f6bb4dfe1569981172f27df5f3c25.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center> White king is in check, because the black bishop can reach the cell with the white king in one move. The answer is &quot;<span class="tex-font-style-tt">YES</span>&quot;.<p>Picture for the second sample: </p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/ffe9233c1153ab298f9beb299795f320e53990b3.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center> Here bishop can't reach the cell with the white king, because his path is blocked by the rook, and the bishop cant &quot;leap&quot; over it. Rook can't reach the white king, because it can't move diagonally. Hence, the king is not in check and the answer is &quot;<span class="tex-font-style-tt">NO</span>&quot;.</div></div><p>  </p></div>
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">E. Anton and Tree</div><div class="time-limit"><div class="property-title">time limit per test</div>3 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Anton is growing a tree in his garden. In case you forgot, the tree is a connected acyclic undirected graph.</p><p>There are <span class="tex-span"><i>n</i></span> vertices in the tree, each of them is painted black or white. Anton doesn't like multicolored trees, so he wants to change the tree such that all vertices have the same color (black or white).</p><p>To change the colors Anton can use only operations of one type. We denote it as <span class="tex-span"><i>paint</i>(<i>v</i>)</span>, where <span class="tex-span"><i>v</i></span> is some vertex of the tree. This operation changes the color of all vertices <span class="tex-span"><i>u</i></span> such that all vertices on the shortest path from <span class="tex-span"><i>v</i></span> to <span class="tex-span"><i>u</i></span> have the same color (including <span class="tex-span"><i>v</i></span> and <span class="tex-span"><i>u</i></span>). For example, consider the tree</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/743d98b529ef7a6cc1ef00db0d15c89abcd4fa68.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>and apply operation <span class="tex-span"><i>paint</i>(3)</span> to get the following:</p><center> <img class="tex-graphics" src="https://espresso.codeforces.com/c70da7466118eb36e82383380d75e7da5755bbe6.png" style="max-width: 100.0%;max-height: 100.0%;" /> </center><p>Anton is interested in the minimum number of operation he needs to perform in order to make the colors of all vertices equal.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line of the input contains a single integer <span class="tex-span"><i>n</i></span> (<span class="tex-span">1 ≤ <i>n</i> ≤ 200 000</span>) — the number of vertices in the tree.</p><p>The second line contains <span class="tex-span"><i>n</i></span> integers <span class="tex-span"><i>color</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">0 ≤ <i>color</i><sub class="lower-index"><i>i</i></sub> ≤ 1</span>) — colors of the vertices. <span class="tex-span"><i>color</i><sub class="lower-index"><i>i</i></sub> = 0</span> means that the <span class="tex-span"><i>i</i></span>-th vertex is initially painted white, while <span class="tex-span"><i>color</i><sub class="lower-index"><i>i</i></sub> = 1</span> means it's initially painted black.</p><p>Then follow <span class="tex-span"><i>n</i> - 1</span> line, each of them contains a pair of integers <span class="tex-span"><i>u</i><sub class="lower-index"><i>i</i></sub></span> and <span class="tex-span"><i>v</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">1 ≤ <i>u</i><sub class="lower-index"><i>i</i></sub>, <i>v</i><sub class="lower-index"><i>i</i></sub> ≤ <i>n</i>, <i>u</i><sub class="lower-index"><i>i</i></sub> ≠ <i>v</i><sub class="lower-index"><i>i</i></sub></span>) — indices of vertices connected by the corresponding edge. It's guaranteed that all pairs <span class="tex-span">(<i>u</i><sub class="lower-index"><i>i</i></sub>, <i>v</i><sub class="lower-index"><i>i</i></sub>)</span> are distinct, i.e. there are no multiple edges.</p></div><div class="output-specification"><div class="section-title">Output</div><p>Print one integer — the minimum number of operations Anton has to apply in order to make all vertices of the tree black or all vertices of the tree white.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>11<br />0 0 0 1 1 0 1 0 0 1 1<br />1 2<br />1 3<br />2 4<br />2 5<br />5 6<br />5 7<br />3 8<br />3 9<br />3 10<br />9 11<br /></pre></div><div class="output"><div class="title">Output</div><pre>2<br /></pre></div><div class="input"><div class="title">Input</div><pre>4<br />0 0 0 0<br />1 2<br />2 3<br />3 4<br /></pre></div><div class="output"><div class="title">Output</div><pre>0<br /></pre></div></div></div><div class="note"><div class="section-title">Note</div><p>In the first sample, the tree is the same as on the picture. If we first apply operation <span class="tex-span"><i>paint</i>(3)</span> and then apply <span class="tex-span"><i>paint</i>(6)</span>, the tree will become completely black, so the answer is <span class="tex-span">2</span>.</p><p>In the second sample, the tree is already white, so there is no need to apply any operations and the answer is <span class="tex-span">0</span>.</p></div></div><p>  </p></div>
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+        <div class="ttypography"><div class="problem-statement"><div class="header"><div class="title">F. Anton and School</div><div class="time-limit"><div class="property-title">time limit per test</div>2 seconds</div><div class="memory-limit"><div class="property-title">memory limit per test</div>256 megabytes</div><div class="input-file"><div class="property-title">input</div>standard input</div><div class="output-file"><div class="property-title">output</div>standard output</div></div><div><p>Anton goes to school, his favorite lessons are arraystudying. He usually solves all the tasks pretty fast, but this time the teacher gave him a complicated one: given two arrays <span class="tex-span"><i>b</i></span> and <span class="tex-span"><i>c</i></span> of length <span class="tex-span"><i>n</i></span>, find array <span class="tex-span"><i>a</i></span>, such that:</p><p><img align="middle" class="tex-formula" src="https://espresso.codeforces.com/740a8e062ff019090dccc22c683a81ee764fd5b3.png" style="max-width: 100.0%;max-height: 100.0%;" /></p><p>where <span class="tex-span"><i>a</i> <i>and</i> <i>b</i></span> means bitwise AND, while <span class="tex-span"><i>a</i> <i>or</i> <i>b</i></span> means bitwise OR.</p><p>Usually Anton is good in arraystudying, but this problem is too hard, so Anton asks you to help.</p></div><div class="input-specification"><div class="section-title">Input</div><p>The first line of the input contains a single integers <span class="tex-span"><i>n</i></span> (<span class="tex-span">1 ≤ <i>n</i> ≤ 200 000</span>) — the size of arrays <span class="tex-span"><i>b</i></span> and <span class="tex-span"><i>c</i></span>.</p><p>The second line contains <span class="tex-span"><i>n</i></span> integers <span class="tex-span"><i>b</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">0 ≤ <i>b</i><sub class="lower-index"><i>i</i></sub> ≤ 10<sup class="upper-index">9</sup></span>) — elements of the array <span class="tex-span"><i>b</i></span>.</p><p>Third line contains <span class="tex-span"><i>n</i></span> integers <span class="tex-span"><i>c</i><sub class="lower-index"><i>i</i></sub></span> (<span class="tex-span">0 ≤ <i>c</i><sub class="lower-index"><i>i</i></sub> ≤ 10<sup class="upper-index">9</sup></span>) — elements of the array <span class="tex-span"><i>c</i></span>.</p></div><div class="output-specification"><div class="section-title">Output</div><p>If there is no solution, print <span class="tex-span"> - 1</span>.</p><p>Otherwise, the only line of the output should contain <span class="tex-span"><i>n</i></span> non-negative integers <span class="tex-span"><i>a</i><sub class="lower-index"><i>i</i></sub></span> — elements of the array <span class="tex-span"><i>a</i></span>. If there are multiple possible solutions, you may print any of them.</p></div><div class="sample-tests"><div class="section-title">Examples</div><div class="sample-test"><div class="input"><div class="title">Input</div><pre>4<br />6 8 4 4<br />16 22 10 10<br /></pre></div><div class="output"><div class="title">Output</div><pre>3 5 1 1 <br /></pre></div><div class="input"><div class="title">Input</div><pre>5<br />8 25 14 7 16<br />19 6 9 4 25<br /></pre></div><div class="output"><div class="title">Output</div><pre>-1<br /></pre></div></div></div></div><p>  </p></div>
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 2023-07-17 01:31:18 +02:00
Matej Focko
2ef5f300ca
chore(cpp): add frequently used headers and yes/no 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 20:20:19 +02:00
Matej Focko
1464165a91
chore: format using google style 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 20:20:03 +02:00
Matej Focko
d98a05a245
977(A,cpp): solve “Wrong Subtraction” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 14:23:27 +02:00
Matej Focko
fddc548fbb
chore(cpp): update skeleton 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 14:23:09 +02:00
Matej Focko
2ef0fc35e0
59(A,cpp): solve “Word” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 12:31:50 +02:00
Matej Focko
b1aab9a29b
617(A,cpp): solve “Elephant” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 12:11:53 +02:00
Matej Focko
21a5ae826a
chore: support downloading multiple contests 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:59:21 +02:00
Matej Focko
67318c5756
546(A,cpp): solve “Soldier and Bananas” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:40:09 +02:00
Matej Focko
c2192f52e7
chore(cpp): improve skeleton 
* add power
* add ‹using namespace std›

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:39:30 +02:00
Matej Focko
f4d67c60f0
791(A,cpp): solve “Bear and Big Brother” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:33:37 +02:00
Matej Focko
9e5f237dfd
chore(cpp): build catch2 only in common directory 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
85ccacae44
266(A,cpp): solve “Stones on the Table” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
5013af5dcb
chore(cpp): adjust skeleton and makefile 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
13413ad429
236(A,java): solve “Boy or Girl” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
609f58d2ee
281(A,java): solve “Word Capitalization” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
4bba56bf8e
339(A,java): solve “Helpful Maths” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
b30e733cac
112(A,java): solve “Petya and Strings” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
97921c6340
chore: improve gitignore 
* ignore scripts everywhere else apart from root and common
* ignore skeletones everywhere else apart from common

Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:16 +02:00
Matej Focko
66a0cec5a1
263(A,java): solve “Beautiful Matrix” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 11:32:14 +02:00
Matej Focko
93cf1f6b10
282(A,java): solve “Bit++” 
Signed-off-by: Matej Focko <me@mfocko.xyz>
 2023-07-10 09:57:00 +02:00