chore: initial commit

Signed-off-by: Matej Focko <mfocko@redhat.com>
This commit is contained in:
Matej Focko 2021-12-28 16:12:22 +01:00
commit fc899b0b02
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217 changed files with 5356 additions and 0 deletions

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namespace Solution {
using System;
using System.Collections.Generic;
public class BattleshipField {
private enum Direction {
HORIZONTAL,
VERTICAL
}
private class Ship {
private int y, x;
private Direction d;
private int size;
public int Size {get => size;}
public Ship(int y, int x, Direction d, int size) {
this.y = y;
this.x = x;
this.d = d;
this.size = size;
}
public bool IsTouching(Ship b) {
if (d == Direction.HORIZONTAL) {
if ((b.y >= this.y - 1 && b.y <= this.y + 1) &&
(b.x >= this.x - 1 && b.x <= this.x + this.size))
return true;
else return false;
}
if (d == Direction.VERTICAL) {
if ((b.x >= this.x - 1 && b.x <= this.x + 1) &&
(b.y >= this.y - 1 && b.y <= this.y + this.size))
return true;
else return false;
}
return false;
}
public override string ToString() {
string direction = this.d == Direction.HORIZONTAL ? "horizontal" : "vertical";
return $"x: {this.x}\ty: {this.y}\tdir: {direction}\tsize: {this.size}";
}
}
private List<Ship> ships;
private int battleships = 1,
cruisers = 2,
destroyers = 3,
submarines = 4;
public BattleshipField() {
this.ships = new List<Ship>();
}
private void registerShip(int y, int x, Direction d, int count) {
this.ships.Add(new Ship(y, x, d, count));
switch (count) {
case 1:
this.submarines--;
break;
case 2:
this.destroyers--;
break;
case 3:
this.cruisers--;
break;
case 4:
this.battleships--;
break;
}
}
private bool areTouching() {
for (var i = 0; i < this.ships.Count - 1; i++)
for (var j = i + 1; j < this.ships.Count; j++)
if (this.ships[i].IsTouching(this.ships[j])) return true;
return false;
}
public bool IsValidField() {
if (this.submarines != 0 || this.destroyers != 0 ||
this.cruisers != 0 || this.battleships != 0)
return false;
else if (this.areTouching())
return false;
return true;
}
public static bool ValidateBattlefield(int[,] field) {
// Write your magic here
var validator = new BattleshipField();
int count = 0;
for (int y = 0, rows = field.GetLength(0); y < rows; y++) {
for (int x = 0, cols = field.GetLength(0); x < cols; x++) {
if (field[y, x] == 1) {
// check for vertical ship
if (count == 0) {
if (y < rows - 1 && field[y + 1, x] == 1) {
for (int dy = 0; y + dy < rows; dy++) {
if (field[y + dy, x] == 1) {
field[y + dy, x] = 0;
count++;
} else break;
}
if (count > 1) {
validator.registerShip(y, x, Direction.VERTICAL, count);
count = 0;
continue;
}
}
}
field[y, x] = 0;
count++;
} else if (field[y, x] == 0 && count > 0) {
validator.registerShip(y, x - count, Direction.HORIZONTAL, count);
count = 0;
}
}
}
return validator.IsValidField();
}
}
}

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using System;
using System.Collections.Generic;
using System.Linq;
public class KataSolution {
public static IEnumerable<long> Combinations(long n) {
if (n < 0) {
Console.WriteLine("Error happened");
throw new ArgumentException("n cannot be negative");
}
for (
long k = 0, nCk = 1;
k <= n;
nCk = nCk * (n - k) / (k + 1), k++
) {
yield return nCk;
}
}
public static IEnumerable<long> Range(long count) {
for (var i = 0; i < count; i++) {
yield return i;
}
}
public static IEnumerable<long> Expand(int a, int b, int n) {
long aExpd = (long) Math.Pow(a, n);
long bExpd = 1;
foreach (var nCk in Combinations(n)) {
yield return nCk * aExpd * bExpd;
aExpd /= a;
bExpd *= b;
}
}
public static (int, int, string) ParseInner(string expr) {
var innerPart = expr.Split('^')[0];
innerPart = innerPart.Substring(1, innerPart.Length - 2);
var coeffA = new String(
innerPart.TakeWhile(c => !char.IsLetter(c)).ToArray()
);
var variable = new String(
innerPart.SkipWhile(c => !char.IsLetter(c)).TakeWhile(char.IsLetter).ToArray()
);
var coeffB = new String(
innerPart.SkipWhile(c => !char.IsLetter(c)).SkipWhile(char.IsLetter).ToArray()
);
var parsedCoeffA = coeffA switch {
"" => 1,
"-" => -1,
_ => int.Parse(coeffA)
};
return (parsedCoeffA, int.Parse(coeffB), variable);
}
public static int ParseExponent(string expr) {
var splitExpr = expr.Split('^');
return int.Parse(splitExpr[1]);
}
public static string FormatTerm(long coefficient, string variable, long exponent) {
var prefix = (coefficient > 0) ? "+" : "";
if (coefficient == 0) {
return "";
}
if ((coefficient == 1 || coefficient == -1) && exponent == 0) {
return $"{prefix}{coefficient}";
}
var coeff = coefficient switch {
0 => "",
1 => prefix,
-1 => "-",
_ => $"{prefix}{coefficient}"
};
var varExp = exponent switch {
0 => "",
1 => variable,
_ => $"{variable}^{exponent}"
};
return $"{coeff}{varExp}";
}
public static string Expand(string expr) {
var n = ParseExponent(expr);
var (a, b, variable) = ParseInner(expr);
var result = "";
foreach (var (exponent, coefficient) in Range(n + 1).Reverse().Zip(Expand(a, b, n))) {
result += FormatTerm(coefficient, variable, exponent);
}
return result.TrimStart(new char[] {'+'});
}
}

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using System;
using System.Collections.Generic;
using System.Linq;
public static class Kata {
private class Graph {
private struct Edge {
public char Through { get; set; }
public char To { get; set; }
};
public static readonly char NO_CONDITION = '\0';
private Dictionary<char, List<Edge>> edges = new Dictionary<char, List<Edge>>();
private HashSet<char> visited = new HashSet<char>();
private Graph addEdge(char src, char through, char dst) {
var newEdge = new Edge {
Through = through,
To = dst
};
if (edges.TryGetValue(src, out var lst)) {
lst.Add(newEdge);
} else {
edges.Add(src, new List<Edge>() { newEdge });
}
return this;
}
public Graph AddDirectEdge(char src, char dst)
=> addEdge(src, NO_CONDITION, dst);
public Graph AddIndirectEdge(char src, char through, char dst)
=> addEdge(src, through, dst);
public Graph AddBiDirectEdge(char src, char dst)
=> AddBiIndirectEdge(src, NO_CONDITION, dst);
public Graph AddBiIndirectEdge(char src, char through, char dst) =>
addEdge(src, through, dst)
.addEdge(dst, through, src);
public void ResetVisited() => visited.Clear();
public bool BeenVisited(char vertex) => visited.Contains(vertex);
public void Mark(char vertex) => visited.Add(vertex);
public void Unmark(char vertex) => visited.Remove(vertex);
public bool HasEdge(char fromVertex, char toVertex)
=> edges[fromVertex].Any(e => e.To == toVertex && (e.Through == NO_CONDITION || BeenVisited(e.Through)));
public Graph AddMultipleBiDirectEdges(char fromVertex, string toVertices) {
foreach (var toVertex in toVertices) {
AddBiDirectEdge(fromVertex, toVertex);
}
return this;
}
}
private static Graph g = new Graph()
.AddMultipleBiDirectEdges('A', "BDEFH").AddMultipleBiDirectEdges('B', "CDEFGI")
.AddMultipleBiDirectEdges('C', "DEFH").AddMultipleBiDirectEdges('D', "EGHI")
.AddMultipleBiDirectEdges('E', "FGHI").AddMultipleBiDirectEdges('F', "GHI")
.AddMultipleBiDirectEdges('G', "H").AddMultipleBiDirectEdges('H', "I")
.AddBiIndirectEdge('A', 'B', 'C').AddBiIndirectEdge('A', 'D', 'G').AddBiIndirectEdge('A', 'E', 'I')
.AddBiIndirectEdge('B', 'E', 'H').AddBiIndirectEdge('C', 'E', 'G').AddBiIndirectEdge('C', 'F', 'I')
.AddBiIndirectEdge('D', 'E', 'F').AddBiIndirectEdge('G', 'H', 'I');
public static int CountPatternsFrom(char firstDot, int length) {
if (length <= 0 || length >= 10) {
return 0;
}
if (length == 1) {
return 1;
}
int total = 0;
g.Mark(firstDot);
foreach (var vertex in "ABCDEFGHI") {
if (!g.BeenVisited(vertex) && g.HasEdge(firstDot, vertex)) {
total += CountPatternsFrom(vertex, length - 1);
}
}
g.Unmark(firstDot);
return total;
}
}

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using System;
using System.Collections.Generic;
using System.Linq;
public class Skyscrapers {
private static IEnumerable<List<T>> Permutations<T>(List<T> initial)
where T: IComparable<T> {
yield return initial;
var hasNext = initial.Count > 1;
while (hasNext) {
var k = 0;
var l = 0;
hasNext = false;
for (var i = initial.Count - 1; i > 0; i--) {
if (initial[i].CompareTo(initial[i - 1]) > 0) {
k = i - 1;
hasNext = true;
break;
}
}
for (var i = initial.Count - 1; i > k; i--) {
if (initial[i].CompareTo(initial[k]) > 0) {
l = i;
break;
}
}
(initial[k], initial[l]) = (initial[l], initial[k]);
initial.Reverse(k + 1, initial.Count - k - 1);
if (hasNext) {
yield return initial;
}
}
}
private static bool IsValid(List<int> heights, int clue) {
var canSee = 1;
var lastHeight = heights[0];
for (var i = 1; i < heights.Count; i++) {
var currentHeight = heights[i];
if (currentHeight > lastHeight) {
lastHeight = currentHeight;
canSee++;
}
}
return canSee == clue;
}
private static IEnumerable<List<int>> PossibleHeights(int size, int clue) {
var initial = new List<int>();
for (var i = 0; i < size; i++) {
initial.Add(i + 1);
}
if (clue == 0) {
return Permutations(initial);
}
return Permutations(initial).Where(heights => IsValid(heights, clue));
}
private static int Size {
get => 4;
}
private static (int, int) GetDiffs(int clueIndex) {
if (clueIndex < Size) {
return (0, 1);
} else if (clueIndex < 2 * Size) {
return (-1, 0);
} else if (clueIndex < 3 * Size) {
return (0, -1);
}
return (1, 0);
}
private static (int, int) GetStarts(int clueIndex) {
if (clueIndex < Size) {
return (clueIndex, 0);
} else if (clueIndex < 2 * Size) {
return (Size - 1, clueIndex % Size);
} else if (clueIndex < 3 * Size) {
return (Size - 1 - clueIndex % Size, Size - 1);
}
return (0, Size - 1 - clueIndex % Size);
}
private static List<int> BackupHeights(int[][] heights, int clueIndex) {
var backup = new List<int>();
var (dx, dy) = GetDiffs(clueIndex);
for (
var (x, y) = GetStarts(clueIndex);
x >= 0 && x < Size && y >= 0 && y < Size;
x += dx, y += dy
) {
backup.Add(heights[y][x]);
}
return backup;
}
private static bool EmplaceHeights(
int[][] heights, int clueIndex, List<int> newHeights, bool force
) {
int i = 0;
var (dx, dy) = GetDiffs(clueIndex);
for (
var (x, y) = GetStarts(clueIndex);
x >= 0 && x < Size && y >= 0 && y < Size;
x += dx, y += dy
) {
if (
!force && heights[y][x] != 0 && heights[y][x] != newHeights[i]
) {
return false;
}
heights[y][x] = newHeights[i++];
}
return true;
}
private static bool SolvePuzzle(
int[][] heights, int[] clues, int clueIndex, bool ignoreZeroes
) {
while (clueIndex < 4 * Size && (
(ignoreZeroes && clues[clueIndex] == 0) || (!ignoreZeroes && clues[clueIndex] != 0)
)) {
clueIndex++;
}
if (clueIndex >= 4 * Size) {
return true;
}
// create copy of heights to ensure correct resetting
var currentHeights = BackupHeights(heights, clueIndex);
// iterate through the options
foreach (var possibleHeights in PossibleHeights(Size, clues[clueIndex])) {
// emplace heights and if conflict occurs, reset and try next one
if (!EmplaceHeights(heights, clueIndex, possibleHeights, false)) {
EmplaceHeights(heights, clueIndex, currentHeights, true);
continue;
}
// if no conflict present, try filling out other clues
if (SolvePuzzle(heights, clues, clueIndex + 1, ignoreZeroes)) {
return true;
}
// otherwise reset heights and try again
EmplaceHeights(heights, clueIndex, currentHeights, true);
}
// if we got here, there is no feasible configuration of buildings
return false;
}
public static int[][] SolvePuzzle(int[] clues) {
var result = new int[Size][];
for (var i = 0; i < Size; i++) {
result[i] = new int[Size];
}
SolvePuzzle(result, clues, 0, true);
// in case there are left zeroes
SolvePuzzle(result, clues, 0, false);
return result;
}
}

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import java.util.ArrayList;
import java.util.Collections;
import java.util.Iterator;
import java.util.List;
import java.util.NoSuchElementException;
import java.util.stream.Stream;
import java.util.stream.StreamSupport;
public class SkyScrapers {
private static class Permutations<T extends Comparable<T>> implements Iterable<List<T>> {
public class PermutationsIterator implements Iterator<List<T>> {
private List<T> elements;
private boolean _hasNext;
private boolean firstIteration = true;
public PermutationsIterator(List<T> elements) {
this.elements = elements;
_hasNext = elements.size() > 0;
}
private void swap(int k, int l) {
T tmp = elements.get(k);
elements.set(k, elements.get(l));
elements.set(l, tmp);
}
public boolean hasNext() {
return _hasNext;
}
public List<T> next() {
if (!_hasNext) {
throw new NoSuchElementException("No more permutations are left");
}
var lastIteration = new ArrayList<T>(elements);
int k = 0, l = 0;
_hasNext = false;
for (int i = elements.size() - 1; i > 0; i--) {
if (elements.get(i).compareTo(elements.get(i - 1)) > 0) {
k = i - 1;
_hasNext = true;
break;
}
}
for (int i = elements.size() - 1; i > k; i--) {
if (elements.get(i).compareTo(elements.get(k)) > 0) {
l = i;
break;
}
}
swap(k, l);
Collections.reverse(elements.subList(k + 1, elements.size()));
return lastIteration;
}
}
private List<T> elements;
public Permutations(List<T> elements) {
this.elements = elements;
Collections.sort(this.elements);
}
public Iterator<List<T>> iterator() {
return new PermutationsIterator(elements);
}
public Stream<List<T>> stream() {
return StreamSupport.stream(this.spliterator(), false);
}
}
private static class PossibleConfigurations implements Iterable<List<Integer>> {
private List<Integer> initial;
private int clue;
private void generateInitial(int size) {
initial = new ArrayList<Integer>();
for (int i = 0; i < size; i++) {
initial.add(i + 1);
}
}
public PossibleConfigurations(int size, int clue) {
generateInitial(size);
this.clue = clue;
}
public Iterator<List<Integer>> iterator() {
if (clue == 0) {
return (new Permutations(initial)).iterator();
}
return (new Permutations(initial))
.stream()
.filter(heights -> isValid((List<Integer>) heights, clue))
.iterator();
}
}
private static boolean isValid(List<Integer> heights, int clue) {
int canSee = 1;
int lastHeight = heights.get(0);
for (int i = 1; i < heights.size(); i++) {
int currentHeight = heights.get(i);
if (currentHeight > lastHeight) {
lastHeight = currentHeight;
canSee++;
}
}
return canSee == clue;
}
private static int getDx(int clueIndex) {
if (clueIndex >= 4 && clueIndex <= 7) {
return -1;
}
if (clueIndex >= 12) {
return 1;
}
return 0;
}
private static int getDy(int clueIndex) {
if (clueIndex <= 3) {
return 1;
}
if (clueIndex >= 8 && clueIndex <= 11) {
return -1;
}
return 0;
}
private static int getStartX(int clueIndex) {
if (clueIndex < 4) {
return clueIndex;
}
if (clueIndex <= 7) {
return 3;
}
if (clueIndex <= 11) {
return 3 - clueIndex % 4;
}
return 0;
}
private static int getStartY(int clueIndex) {
if (clueIndex < 4) {
return 0;
}
if (clueIndex <= 7) {
return clueIndex % 4;
}
if (clueIndex <= 11) {
return 3;
}
return 3 - clueIndex % 4;
}
private static List<Integer> backupHeights(int[][] heights, int clueIndex) {
List<Integer> backup = new ArrayList<Integer>();
int dx = getDx(clueIndex);
int dy = getDy(clueIndex);
for (
int x = getStartX(clueIndex), y = getStartY(clueIndex);
x >= 0 && x < 4 && y >= 0 && y < 4;
x += dx, y += dy
) {
backup.add(heights[y][x]);
}
return backup;
}
private static boolean emplaceHeights(
int[][] heights, int clueIndex, List<Integer> newHeights, boolean force
) {
int i = 0;
int dx = getDx(clueIndex);
int dy = getDy(clueIndex);
for (
int x = getStartX(clueIndex), y = getStartY(clueIndex);
x >= 0 && x < 4 && y >= 0 && y < 4;
x += dx, y += dy
) {
if (
!force && heights[y][x] != 0 && heights[y][x] != newHeights.get(i)
) {
return false;
}
heights[y][x] = newHeights.get(i++);
}
return true;
}
private static boolean solvePuzzle(
int[][] heights, int[] clues, int clueIndex, boolean ignoreZeroes
) {
while (clueIndex < 16 && ((ignoreZeroes && clues[clueIndex] == 0) || (!ignoreZeroes && clues[clueIndex] != 0))) {
clueIndex++;
}
if (clueIndex >= 16) {
return true;
}
// create copy of heights to ensure correct resetting
List<Integer> currentHeights = backupHeights(heights, clueIndex);
// iterate through the options
for (List<Integer> possibleHeights : new PossibleConfigurations(4, clues[clueIndex])) {
// emplace heights and if conflict occurs, reset and try next one
if (!emplaceHeights(heights, clueIndex, possibleHeights, false)) {
emplaceHeights(heights, clueIndex, currentHeights, true);
continue;
}
// if no conflict present, try filling out other clues
if (solvePuzzle(heights, clues, clueIndex + 1, ignoreZeroes)) {
return true;
}
// otherwise reset heights and try again
emplaceHeights(heights, clueIndex, currentHeights, true);
}
// if we got here, there is no feasible configuration of buildings
return false;
}
static int[][] solvePuzzle(int[] clues) {
var result = new int[4][4];
solvePuzzle(result, clues, 0, true);
// in case there are left zeroes
solvePuzzle(result, clues, 0, false);
return result;
}
}

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using System;
public class Kata {
public static (uint remainder, uint digit) SumTwo(char a, char b, uint c = 0) {
uint val_a = (uint) a - 48;
uint val_b = (uint) b - 48;
var sum = val_a + val_b + c;
return (sum / 10, sum % 10);
}
public static string Add(string a, string b) {
var result = "";
if (a.Length > b.Length) {
var temp = a;
a = b;
b = temp;
}
int idx_a = a.Length - 1;
int idx_b = b.Length - 1;
uint remainder = 0;
uint last_digit = 0;
while (idx_a >= 0) {
(remainder, last_digit) = SumTwo(a[idx_a], b[idx_b], remainder);
result = last_digit.ToString() + result;
idx_a--;
idx_b--;
}
while (idx_b >= 0) {
(remainder, last_digit) = SumTwo('0', b[idx_b], remainder);
result = last_digit.ToString() + result;
idx_b--;
}
if (remainder > 0) {
result = remainder.ToString() + result;
}
return result;
}
}

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function checkExtension(name) {
const extensions = ['.html', '.htm', '.php', '.asp'];
return name.replace(/\.html/g, '').replace(/\.htm/g, '').replace(/\.php/g, '').replace(/\.asp/g, '');
}
function shorten(name) {
if (name.length <= 30) {
name = name.replace(/-/g, ' ');
} else {
const ignore = ["the","of","in","from","by","with","and", "or", "for", "to", "at", "a"];
name = name.split('-').filter(e => !ignore.includes(e)).map(e => e[0]);
name = name.join('');
}
return name.toUpperCase();
}
function buildSegment(url, name, last=false) {
if (last) {
return `<span class="active">${shorten(checkExtension(name))}</span>`;
} else {
return `<a href="${url}">${shorten(checkExtension(name))}</a>`;
}
}
function generateBC(url, separator) {
console.log(url);
if (url.includes('//')) {
url = url.split('//')[1];
}
url = url.split("/").filter(e => {
return !e.startsWith('index');
}).map(e => {
if (e.includes("#"))
return e.substring(0, e.indexOf("#"));
else if (e.includes("?"))
return e.substring(0, e.indexOf("?"));
else
return e;
});
let result = [];
let path = '/';
if ((url.length == 2 && url[1] == '') || url.length == 1) {
result.push(buildSegment('/', 'home', true));
return result.join('');
} else
result.push(buildSegment('/', 'home'));
for (let i = 1; i < url.length - 1; i++) {
path += `${url[i]}/`;
result.push(buildSegment(path, url[i]));
}
path += `/${url[url.length - 1]}`
result.push(buildSegment(path, url[url.length - 1], true));
return result.join(separator);
}

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using System;
public static class Kata {
public static int CountCombinations(int money, int[] coins, bool recursivelyCalled = false) {
if (money == 0 && recursivelyCalled) return 1;
else if (coins.GetLength(0) == 1) {
if (money % coins[0] == 0) return 1;
else return 0;
} else if (!recursivelyCalled) {
Array.Sort(coins);
Array.Reverse(coins);
}
var result = 0;
var times = money / coins[0];
var newCoins = new int[coins.GetLength(0) - 1];
for (var i = 0; i < coins.GetLength(0) - 1; i++)
newCoins[i] = coins[i + 1];
for (var i = 0; i <= times; i++) {
result += CountCombinations(money - i * coins[0], newCoins, true);
}
return result;
}
}

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function generator(sequencer) {
return sequencer.apply(
null,
[]
.slice
.call(arguments)
.slice(1)
);
}
function dummySeq() {
this.next = function() {
return "dummy";
};
return this;
}
function factorialSeq() {
this.n = 1;
this.i = 0;
this.next = function() {
const value = this.n;
this.i++;
this.n *= this.i;
return value;
};
return this;
}
function fibonacciSeq() {
this.prev = 0;
this.current = 1;
this.next = function() {
const value = this.current;
const newValue = this.prev + this.current;
this.prev = this.current;
this.current= newValue;
return value;
};
return this;
}
function rangeSeq(start, step) {
this.value = start;
this.step = step;
this.next = function() {
const oldValue = this.value;
this.value += this.step;
return oldValue;
};
return this;
}
function primeSeq() {
const isPrime = function(n) {
const top = Math.floor(Math.sqrt(n));
for (let i = 2; i <= top; i++) {
if (n % i == 0) {
return false;
}
}
return true;
};
const nextPrime = function(n) {
n++;
while (!isPrime(n)) {
n++;
}
return n;
};
this.p = 1;
this.next = function() {
this.p = nextPrime(this.p);
return this.p;
};
return this;
}
function partialSumSeq() {
this.values = arguments;
this.length = arguments.length;
this.runningSum = 0;
this.i = 0;
this.next = function() {
if (this.i >= this.length) {
throw new RangeError("All input was processed!");
}
this.runningSum += this.values[this.i++];
return this.runningSum;
};
return this;
}

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using System;
using System.Collections.Generic;
using System.Linq;
public class HumanTimeFormat{
private static Dictionary<string, int> conversions = new Dictionary<string, int>() {
{"year", 31536000},
{"day", 86400},
{"hour", 3600},
{"minute", 60},
{"second", 1}
};
public static string formatDuration(int seconds){
if (seconds == 0) return "now";
var results = new List<string>();
foreach (var pair in conversions) {
var units = seconds / pair.Value;
seconds %= pair.Value;
if (units > 0) {
var part = $"{units} {pair.Key}";
if (units > 1) {
part += "s";
}
results.Add(part);
}
}
if (results.Count == 1) return results[0];
else {
var last = results.Last();
results.Remove(last);
var result = String.Join(", ", results);
return result + " and " + last;
}
}
}

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using System;
public class Magnets
{
public static double Doubles(int maxk, int maxn)
{
double val = 0;
for (int k = 1; k <= maxk; k++)
for (int n = 1; n <= maxn; n++)
val += 1 / (k * Math.Pow(n + 1, 2 * k));
return val;
}
}

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#include <cmath>
#include <iostream>
#include <vector>
using namespace std;
vector<vector<long long>> transform(vector<vector<long long>> m, int row,
int col) {
vector<vector<long long>> result;
for (int i = 0; i < m.size(); i++) {
if (i == row)
continue;
vector<long long> actual_row;
for (int j = 0; j < m[i].size(); j++) {
if (j == col)
continue;
actual_row.push_back(m[i][j]);
}
result.push_back(actual_row);
}
return result;
}
long long determinant(vector<vector<long long>> m) {
switch (m.size()) {
case 1:
return m[0][0];
break;
case 2:
return m[0][0] * m[1][1] - m[0][1] * m[1][0];
break;
}
long long result = 0;
for (int i = 0; i < m.size(); i++) {
auto l_m = transform(m, i, 0);
result += pow(-1, i + 2) * m[i][0] * determinant(l_m);
}
return result;
}

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using System;
using System.Collections.Generic;
using System.Linq;
public class Kata {
public static List<long> ExtractDigits(long n) {
var result = new List<long>();
while (n > 0) {
result.Add(n % 10);
n /= 10;
}
result.Reverse();
return result;
}
public static bool NextPermutation(List<long> digits) {
// foreach (var digit in digits) Console.Write($"{digit} ");
// Console.WriteLine();
var k = -1;
for (var i = 0; i < digits.Count - 1; i++) {
if (digits[i] < digits[i + 1])
k = i;
}
if (k == -1) return false;
var l = k;
for (var i = 0; i < digits.Count; i++)
if (digits[k] < digits[i]) l = i;
if (l == k) return false;
var tmp = digits[k];
digits[k] = digits[l];
digits[l] = tmp;
// foreach (var digit in digits) Console.Write($"{digit} ");
// Console.WriteLine();
digits.Reverse(k + 1, digits.Count - k - 1);
// foreach (var digit in digits) Console.Write($"{digit} ");
// Console.WriteLine();
return true;
}
public static long NextBiggerNumber(long n) {
if (n < 10) return -1;
var digits = ExtractDigits(n);
if (!NextPermutation(digits)) {
return -1;
} else {
var result = 0l;
foreach (var digit in digits) {
result *= 10;
result += digit;
}
return result;
}
}
}

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#include <algorithm>
#include <iostream>
#include <set>
#include <string>
#include <vector>
template <typename T> bool nextPermutation(std::vector<T> &vec) {
// Find non-increasing suffix
if (vec.empty())
return false;
typename std::vector<T>::iterator i = vec.end() - 1;
while (i > vec.begin() && *(i - 1) >= *i)
--i;
if (i == vec.begin())
return false;
// Find successor to pivot
typename std::vector<T>::iterator j = vec.end() - 1;
while (*j <= *(i - 1))
--j;
std::iter_swap(i - 1, j);
// Reverse suffix
std::reverse(i, vec.end());
return true;
}
std::vector<std::string> permutations(std::string s) {
std::set<std::string> strings;
std::vector<std::string> result;
std::vector<char> s_vec;
// copy string into vector
for (auto ch = s.begin(); ch != s.end(); ch++) {
s_vec.push_back(*ch);
}
// do the magic
std::sort(s_vec.begin(), s_vec.end());
do {
strings.insert(std::string(s_vec.begin(), s_vec.end()));
} while (nextPermutation(s_vec));
std::copy(strings.begin(), strings.end(), std::back_inserter(result));
return result;
}

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class Wand {
constructor(spells) {
this.history = [];
Object.assign(this, spells);
return new Proxy(this, {
get: (target, property) => {
const val = target[property];
if (typeof val === 'function') {
target.history.unshift(property);
}
return val;
}
});
}
prioriIncantatem() {
return this.history.slice(1, MAX_PRIOR_SPELLS + 1);
}
deletrius() {
this.history = ['deletrius'];
}
}

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using System;
public class PyramidSlideDown
{
public static int LongestSlideDown(int[][] pyramid)
{
for (var i = pyramid.GetLength(0) - 2; i >= 0; i--) {
for (var j = 0; j <= i; j++) {
if (pyramid[i + 1][j] > pyramid[i + 1][j + 1]) {
pyramid[i][j] += pyramid[i + 1][j];
} else {
pyramid[i][j] += pyramid[i + 1][j + 1];
}
}
}
return pyramid[0][0];
}
}

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function swap(array, i, j) {
let temporary = array[i];
array[i] = array[j];
array[j] = temporary;
}
function removeZeros(array) {
// Sort "array" so that all elements with the value of zero are moved to the
// end of the array, while the other elements maintain order.
// [0, 1, 2, 0, 3] --> [1, 2, 3, 0, 0]
// Zero elements also maintain order in which they occurred.
// [0, "0", 1, 2, 3] --> [1, 2, 3, 0, "0"]
// Do not use any temporary arrays or objects. Additionally, you're not able
// to use any Array or Object prototype methods such as .shift(), .push(), etc
// the correctly sorted array should be returned.
for (let i = array.length - 2; i > -1; i--) {
if (array[i] === 0 || array[i] === '0') {
for (let j = i; j < array.length - 1 && array[j + 1] !== 0 && array[j + 1] !== '0'; j++) {
swap(array, j, j + 1);
}
}
}
return array;
}

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class Expression {
private static readonly INVALID_REQUEST: string = "400: Bad request";
value: string;
l: Expression | null = null;
r: Expression | null = null;
private splitBy(operation: string): boolean {
let splitOperands = this.value.split(operation);
if (splitOperands.length < 2) {
return false;
}
this.value = operation;
this.r = new Expression(splitOperands.pop());
this.l = new Expression(splitOperands.join(operation));
return true;
}
constructor(expr: string) {
this.value = expr;
for (let operation of "+-*$") {
if (this.splitBy(operation)) {
return;
}
}
}
public evaluate(): (number | string) {
if (this.l === null && this.r === null) {
// process constants
if (![...this.value].every(c => "0123456789.".includes(c))) {
return Expression.INVALID_REQUEST;
}
const val = Number.parseFloat(this.value);
return val;
}
if (this.l === null || this.r === null || !("+-$*".includes(this.value))) {
return Expression.INVALID_REQUEST;
}
const left = this.l.evaluate();
const right = this.r.evaluate();
if (typeof left !== "number" || typeof right !== "number") {
return Expression.INVALID_REQUEST;
}
let operation = null;
switch (this.value) {
case "+":
return left + right;
case "-":
return left - right;
case "$":
return left / right;
case "*":
return left * right;
}
}
}
export const calculate = (sum: string): (number | string) => {
return new Expression(sum).evaluate();
}

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using System;
using System.Collections.Generic;
public class TCP {
private static bool IsInitialized = false;
private static Dictionary<string, Dictionary<string, string>> Transitions = new Dictionary<string, Dictionary<string, string>>();
private static void InitializeIfNeeded() {
if (IsInitialized) {
return;
}
IsInitialized = true;
var transitions = new List<(string, string, string)>() {
("CLOSED", "APP_PASSIVE_OPEN" , "LISTEN"),
("CLOSED", "APP_ACTIVE_OPEN" , "SYN_SENT"),
("LISTEN", "RCV_SYN" , "SYN_RCVD"),