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<title data-rh="true">8th seminar | mf</title><meta data-rh="true" name="viewport" content="width=device-width,initial-scale=1"><meta data-rh="true" name="twitter:card" content="summary_large_image"><meta data-rh="true" property="og:url" content="https://blog.mfocko.xyz/pb071/bonuses/seminar-08"><meta data-rh="true" name="docusaurus_locale" content="en"><meta data-rh="true" name="docsearch:language" content="en"><meta data-rh="true" name="docusaurus_version" content="current"><meta data-rh="true" name="docusaurus_tag" content="docs-pb071-current"><meta data-rh="true" name="docsearch:version" content="current"><meta data-rh="true" name="docsearch:docusaurus_tag" content="docs-pb071-current"><meta data-rh="true" property="og:title" content="8th seminar | mf"><meta data-rh="true" name="description" content="Manipulating with files only char-by-char and a magic tree.
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class="tocCollapsible_ETCw theme-doc-toc-mobile tocMobile_ITEo"><button type="button" class="clean-btn tocCollapsibleButton_TO0P">On this page</button></div><div class="theme-doc-markdown markdown"><h1>8th seminar bonus assignment</h1><p><a href="/files/pb071/bonuses/08.tar.gz" target="_blank" rel="noopener noreferrer">Source</a></p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="introduction">Introduction<a href="#introduction" class="hash-link" aria-label="Direct link to Introduction" title="Direct link to Introduction"></a></h2><p>In this bonus you can implement two tasks, one of them has a bonus part with generic
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solution.</p><p>One is focused on counting ananas or in case of generic version any substring in
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the file, but with a restriction on the function you use.</p><p>Other one has a more algorithmic spirit.</p><p>For this bonus you can get at maximum 2.5 K₡.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="warning">Warning<a href="#warning" class="hash-link" aria-label="Direct link to Warning" title="Direct link to Warning"></a></h2><p><strong>DO NOT COMMIT test data</strong> to your own git repository, since the tests include
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files that exceed 10MB by themselves. Even if they are on separate branch, they
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take up the space.</p><h2 class="anchor anchorWithStickyNavbar_LWe7" id="testing">Testing<a href="#testing" class="hash-link" aria-label="Direct link to Testing" title="Direct link to Testing"></a></h2><p>For testing you are provided with python script (requires <code>click</code> to be installed:
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<code>pip3 install --user click</code>) and <code>Makefile</code> that provides following targets:</p><ul><li><code>check-counting</code> - runs the <code>counting</code> tests</li><li><code>check-counting-bonus</code> - runs the <code>counting</code> tests with bonus implemented</li><li><code>check</code> - runs both <code>counting</code> and <code>counting-bonus</code> tests</li><li><code>clean</code> - removes output files from the test runs</li></ul><h2 class="anchor anchorWithStickyNavbar_LWe7" id="task-no-1-counting-075-k">Task no. 1: Counting (0.75 K₡)<a href="#task-no-1-counting-075-k" class="hash-link" aria-label="Direct link to Task no. 1: Counting (0.75 K₡)" title="Direct link to Task no. 1: Counting (0.75 K₡)"></a></h2><p>Your first task is to make smallish program that counts occurences of specific
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(or given) word from file and writes the number to other file.</p><p>Usage of the program is:</p><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#000000;--prism-background-color:#ffffff"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#000000"><span class="token plain">Usage: ./counting <input-file> <output-file> [string-to-be-counted]</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><p>Arguments that are passed to the program represent:</p><ul><li><code><input-file></code> - path to the file where we count the words</li><li><code><output-file></code> - path to the file where we output the count</li><li>(optional argument) <code>[string-to-be-counted]</code> - in case you implement bonus,
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otherwise we default to word <code>ananas</code> ;)</li></ul><p>In skeleton you are given 3 empty, but documented, functions to implement.</p><ol><li><code>count_anything</code> - function accepts input file and substring to be counted in
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the file, returns the count.</li><li><code>count_ananas</code> - same as <code>count_anything</code>, but specialized for ananases, the
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default implementation from the skeleton expects you to implement <code>count_anything</code>
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and therefore it just calls the other function.</li><li><code>write_number</code> - function that writes the number to the file, why would you
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need the function is explained later :)</li></ol><h3 class="anchor anchorWithStickyNavbar_LWe7" id="requirements">Requirements<a href="#requirements" class="hash-link" aria-label="Direct link to Requirements" title="Direct link to Requirements"></a></h3><p>For manipulation with the files you are only allowed to use <code>fopen</code>, <code>fclose</code>,
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<code>fgetc</code> and <code>fputc</code>. Functions like <code>fprintf</code> (except for <code>stderr</code> or logging) and
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<code>fscanf</code> are <strong>forbidden</strong>.</p><p>In case you struggle and want to use one of those functions, the solution will be
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penalized by 50% of points.</p><h3 class="anchor anchorWithStickyNavbar_LWe7" id="bonus-part-075-k">Bonus part (0.75 K₡)<a href="#bonus-part-075-k" class="hash-link" aria-label="Direct link to Bonus part (0.75 K₡)" title="Direct link to Bonus part (0.75 K₡)"></a></h3><p>Bonus part of this assignment is to implement <code>count_anything</code> rather than <code>count_ananas</code>.</p><blockquote><p>Smaller hint: This task does not need dynamic allocation :) You just need one
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good helper function and the right idea ;)</p></blockquote><h2 class="anchor anchorWithStickyNavbar_LWe7" id="task-no-2-weird-trees-1-k">Task no. 2: Weird trees (1 K₡)<a href="#task-no-2-weird-trees-1-k" class="hash-link" aria-label="Direct link to Task no. 2: Weird trees (1 K₡)" title="Direct link to Task no. 2: Weird trees (1 K₡)"></a></h2><p>In this task we are crossing our paths with <em>algorithms and data structures</em>.
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Your task is to write a program that constructs tree from the file that is given
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as an argument and pretty-prints it.</p><p>Input file consists of lines, that include <code>key</code> and <code>rank</code> in form <code>key;rank</code>
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or <code>nil</code>. Why would we have <code>nil</code> in a file? The file represents pre-order iteration
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through the tree. Leaves never have rank different than 0, so you can safely assume
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2 non-existing <code>nil</code>s in the input after you read such node ;)</p><table><tr><th>Example input file</th><th>Tree it represents</th></tr><tr><td><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#000000;--prism-background-color:#ffffff"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#000000"><span class="token plain">8;4</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">5;3</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">3;2</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">2;1</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">1;0</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">nil</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">4;0</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">7;1</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">6;0</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">nil</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">11;2</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">10;1</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">9;0</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">nil</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">12;0</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div></td><td><p><img loading="lazy" alt="tree" src="/assets/images/tree-c9e37f87f9095c00fad33ea034485ce6.png" width="633" height="684" class="img_ev3q"></p></td></tr></table><p>In this task you are only provided with different trees in the <code>test-trees</code> directory.
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Implementation and format of the pretty-print is totally up to you. :)</p><p>Example of mine for the tree above:</p><div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#000000;--prism-background-color:#ffffff"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#000000"><span class="token plain">8 (rank = 4)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">+-- 5 (rank = 3)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">| +-- 3 (rank = 2)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">| | +-- 2 (rank = 1)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">| | | +-- 1 (rank = 0)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">| | +-- 4 (rank = 0)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">| +-- 7 (rank = 1)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">| +-- 6 (rank = 0)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">+-- 11 (rank = 2)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain"> +-- 10 (rank = 1)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain"> | +-- 9 (rank = 0)</span><br></span><span class="token-line" style="color:#000000"><span class="token plain"> +-- 12 (rank = 0)</span><br></span></code></pre><div class="buttonGroup__atx"><button type="button" aria-label="Copy code to clipboard" title="Copy" class="clean-btn"><span class="copyButtonIcons_eSgA" aria-hidden="true"><svg viewBox="0 0 24 24" class="copyButtonIcon_y97N"><path fill="currentColor" d="M19,21H8V7H19M19,5H8A2,2 0 0,0 6,7V21A2,2 0 0,0 8,23H19A2,2 0 0,0 21,21V7A2,2 0 0,0 19,5M16,1H4A2,2 0 0,0 2,3V17H4V3H16V1Z"></path></svg><svg viewBox="0 0 24 24" class="copyButtonSuccessIcon_LjdS"><path fill="currentColor" d="M21,7L9,19L3.5,13.5L4.91,12.09L9,16.17L19.59,5.59L21,7Z"></path></svg></span></button></div></div></div><blockquote><p>Can you find out what are those trees? :)</p></blockquote><h2 class="anchor anchorWithStickyNavbar_LWe7" id="submitting">Submitting<a href="#submitting" class="hash-link" aria-label="Direct link to Submitting" title="Direct link to Submitting"></a></h2><p>In case you have any questions, feel free to reach out to me.</p><hr><p>Ideally submit the assignment through the merge request. Step-by-step tutorial is
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present <a href="/pb071/mr">here</a>. For setting assignee my xlogin is <code>xfocko</code>.</p><p>In case you do not want to experiment on GitLab, send me the source code via email,
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but please prefix subject with: <code>[PB071/14][seminar-08]</code></p><p>Deadline for the submission of the bonus is <strong>May 4th 24:00</strong>.</p></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://gitlab.com/mfocko/blog/tree/main/pb071/bonuses/08.md" target="_blank" rel="noreferrer noopener" class="theme-edit-this-page"><svg fill="currentColor" height="20" width="20" viewBox="0 0 40 40" class="iconEdit_Z9Sw" aria-hidden="true"><g><path d="m34.5 11.7l-3 3.1-6.3-6.3 3.1-3q0.5-0.5 1.2-0.5t1.1 0.5l3.9 3.9q0.5 0.4 0.5 1.1t-0.5 1.2z m-29.5 17.1l18.4-18.5 6.3 6.3-18.4 18.4h-6.3v-6.2z"></path></g></svg>Edit this page</a></div><div class="col lastUpdated_vwxv"><span class="theme-last-updated">Last updated<!-- --> on <b><time datetime="2023-09-07T18:02:15.000Z">Sep 7, 2023</time></b></span></div></div></footer></article><nav class="pagination-nav docusaurus-mt-lg" aria-label="Docs pages"><a class="pagination-nav__link pagination-nav__link--prev" href="/pb071/bonuses/seminar-05-06"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">5th and 6th seminar</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/pb071/bonuses/seminar-10"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">10th seminar</div></a></nav></div></div><div class="col col--3"><div class="tableOfContents_bqdL thin-scrollbar theme-doc-toc-desktop"><ul class="table-of-contents table-of-contents__left-border"><li><a href="#introduction" class="table-of-contents__link toc-highlight">Introduction</a></li><li><a href="#warning" class="table-of-contents__link toc-highlight">Warning</a></li><li><a href="#testing" class="table-of-contents__link toc-highlight">Testing</a></li><li><a href="#task-no-1-counting-075-k" class="table-of-contents__link toc-highlight">Task no. 1: Counting (0.75 K₡)</a><ul><li><a href="#requirements" class="table-of-contents__link toc-highlight">Requirements</a></li><li><a href="#bonus-part-075-k" class="table-of-contents__link toc-highlight">Bonus part (0.75 K₡)</a></li></ul></li><li><a href="#task-no-2-weird-trees-1-k" class="table-of-contents__link toc-highlight">Task no. 2: Weird trees (1 K₡)</a></li><li><a href="#submitting" class="table-of-contents__link toc-highlight">Submitting</a></li></ul></div></div></div></div></main></div></div><footer class="footer footer--dark"><div class="container container-fluid"><div class="row footer__links"><div class="col footer__col"><div class="footer__title">Git</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://github.com/mfocko" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitHub<svg width="13.5" height="13.5" aria-hidden="true" viewBox="0 0 24 24" class="iconExternalLink_nPIU"><path fill="currentColor" d="M21 13v10h-21v-19h12v2h-10v15h17v-8h2zm3-12h-10.988l4.035 4-6.977 7.07 2.828 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