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itemtype="https://schema.org/ListItem" class="breadcrumbs__item"><a class="breadcrumbs__link" itemprop="item" href="/c/category/bonuses/"><span itemprop="name">Bonuses</span></a><meta itemprop="position" content="1"></li><li itemscope="" itemprop="itemListElement" itemtype="https://schema.org/ListItem" class="breadcrumbs__item breadcrumbs__item--active"><span class="breadcrumbs__link" itemprop="name">4th seminar</span><meta itemprop="position" content="2"></li></ul></nav><div 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"><header><h1>4th seminar</h1></header><div class="theme-admonition theme-admonition-caution admonition_xJq3 alert alert--warning"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 16 16"><path fill-rule="evenodd" d="M8.893 1.5c-.183-.31-.52-.5-.887-.5s-.703.19-.886.5L.138 13.499a.98.98 0 0 0 0 1.001c.193.31.53.501.886.501h13.964c.367 0 .704-.19.877-.5a1.03 1.03 0 0 0 .01-1.002L8.893 1.5zm.133 11.497H6.987v-2.003h2.039v2.003zm0-3.004H6.987V5.987h2.039v4.006z"></path></svg></span>caution</div><div class="admonitionContent_BuS1"><p>Deadline for the submission of the bonus is <strong>March 23th 24:00</strong>.</p></div></div>
<div class="theme-admonition theme-admonition-tip admonition_xJq3 alert alert--success"><div class="admonitionHeading_Gvgb"><span class="admonitionIcon_Rf37"><svg viewBox="0 0 12 16"><path fill-rule="evenodd" d="M6.5 0C3.48 0 1 2.19 1 5c0 .92.55 2.25 1 3 1.34 2.25 1.78 2.78 2 4v1h5v-1c.22-1.22.66-1.75 2-4 .45-.75 1-2.08 1-3 0-2.81-2.48-5-5.5-5zm3.64 7.48c-.25.44-.47.8-.67 1.11-.86 1.41-1.25 2.06-1.45 3.23-.02.05-.02.11-.02.17H5c0-.06 0-.13-.02-.17-.2-1.17-.59-1.83-1.45-3.23-.2-.31-.42-.67-.67-1.11C2.44 6.78 2 5.65 2 5c0-2.2 2.02-4 4.5-4 1.22 0 2.36.42 3.22 1.19C10.55 2.94 11 3.94 11 5c0 .66-.44 1.78-.86 2.48zM4 14h5c-.23 1.14-1.3 2-2.5 2s-2.27-.86-2.5-2z"></path></svg></span>tip</div><div class="admonitionContent_BuS1"><p>In case you have any questions, feel free to reach out either by email, Discord
or just by submitting an issue <a href="https://gitlab.fi.muni.cz/xfocko/kb/-/issues/new" target="_blank" rel="noopener noreferrer">here</a>.</p></div></div>
<p>For this bonus you can get 3 K₡ and another 0.5 K₡ for the bonus part of it.</p>
<p><a href="/files/c/bonuses/04.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 task you are given a 2D map for a robot. The map contains multiple markers:</p>
<ul>
<li><code>^v&lt;&gt;</code> - which denote the directions the robot will be facing when he steps into
the cell or starts on it.</li>
<li><code>K</code> - denotes the key.</li>
<li><code>T</code> - denotes the treasure.</li>
</ul>
<p>In case robot lands at the beginning on unknown field, e.g. <code>.</code> in the tests, he
faces the direction that is given through the parameter.</p>
<p>Your task is to write the <code>walk</code> function that returns end result of the walk.
Walk can end in multiple ways:</p>
<ul>
<li><code>FOUND_TREASURE</code> - when you find the treasure</li>
<li><code>FOUND_KEY</code> - when you find the key</li>
<li><code>OUT_OF_BOUNDS</code> - when the robot falls off the map</li>
<li><code>INFINITE_LOOP</code> - in case you will implement the bonus</li>
<li><code>NONE</code> - which is used right now as a default return in the skeleton, has no meaning
later on</li>
</ul>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="hard-requirement">Hard requirement<a href="#hard-requirement" class="hash-link" aria-label="Direct link to Hard requirement" title="Direct link to Hard requirement">​</a></h2>
<p>There is only one hard requirement that tests cannot check.</p>
<p><strong>You are not allowed to use any indexing related to map or your current position</strong>
<strong>in your implementation.</strong></p>
<p>Reason for this requirement is for you to get used to working with pointers. And
for the implementation of this task it is much easier to use just the pointers.</p>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="example-of-run">Example of run<a href="#example-of-run" class="hash-link" aria-label="Direct link to Example of run" title="Direct link to Example of run">​</a></h2>
<p>For a better understanding of your task, I will describe a simple walk with corresponding
function call.</p>
<div class="language-c codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-c codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token keyword" style="color:#00009f">const</span><span class="token plain"> </span><span class="token keyword" style="color:#00009f">char</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">*</span><span class="token plain">map </span><span class="token operator" style="color:#393A34">=</span><span class="token plain"> </span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token string" style="color:#e3116c">&quot;&gt;.v&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token string" style="color:#e3116c">&quot;.K&lt;&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"> </span><span class="token string" style="color:#e3116c">&quot;...&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#393A34"><span class="token plain"></span><span class="token function" style="color:#d73a49">walk</span><span class="token punctuation" style="color:#393A34">(</span><span class="token plain">map</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token operator" style="color:#393A34">&amp;</span><span class="token plain">map</span><span class="token punctuation" style="color:#393A34">[</span><span class="token number" style="color:#36acaa">6</span><span class="token punctuation" style="color:#393A34">]</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token char">&#x27;^&#x27;</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#36acaa">3</span><span class="token punctuation" style="color:#393A34">,</span><span class="token plain"> </span><span class="token number" style="color:#36acaa">3</span><span class="token punctuation" style="color:#393A34">)</span><span class="token punctuation" style="color:#393A34">;</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>For this call, you should return <code>FOUND_KEY</code>. Let us walk through the walk ;)</p>
<ol>
<li>
<p>Robot is placed at the bottom left corner, there is no direction specified, so
he follows the direction given by parameter (upwards, denoted as <code>N</code>(orth),
so that we can differentiate markers on the map with the robot when using printing
function).</p>
<div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">&gt;.v</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">.K&lt;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">N..</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>
</li>
<li>
<p>Moves up:</p>
<div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">&gt;.v</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">NK&lt;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">...</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>
</li>
<li>
<p>Moves up (now covers <code>&gt;</code>), changes direction to right:</p>
<div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">E.v</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">.K&lt;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">...</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>
</li>
<li>
<p>Moves to right:</p>
<div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">&gt;Ev</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">.K&lt;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">...</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>
</li>
<li>
<p>Moves to right, faces south:</p>
<div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">&gt;.S</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">.K&lt;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">...</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>
</li>
<li>
<p>Moves down, faces west:</p>
<div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">&gt;.v</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">.KW</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">...</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>
</li>
<li>
<p>Moves left, founds key, returns <code>FOUND_KEY</code>:</p>
<div class="codeBlockContainer_Ckt0 theme-code-block" style="--prism-color:#393A34;--prism-background-color:#f6f8fa"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-text codeBlock_bY9V thin-scrollbar" style="color:#393A34;background-color:#f6f8fa"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#393A34"><span class="token plain">&gt;.v</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">.W&lt;</span><br></span><span class="token-line" style="color:#393A34"><span class="token plain">...</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>
</li>
</ol>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="bonus-part">Bonus part<a href="#bonus-part" class="hash-link" aria-label="Direct link to Bonus part" title="Direct link to Bonus part">​</a></h2>
<p>For the bonus part you are supposed to return <code>INFINITE_LOOP</code> in case the robot
is stuck in the infinite loop. There are three tests for it. If you pass only the
easy and medium one, you can get 0.25 K₡ for doing your best and trying it out. :)</p>
<h2 class="anchor anchorWithStickyNavbar_LWe7" id="easter-eggs">Easter eggs<a href="#easter-eggs" class="hash-link" aria-label="Direct link to Easter eggs" title="Direct link to Easter eggs">​</a></h2>
<ul>
<li>
<p>Statistics</p>
<table><thead><tr><th>Language</th><th style="text-align:right">Files</th><th style="text-align:right">Lines</th><th style="text-align:right">Blanks</th><th style="text-align:right">Comments</th><th style="text-align:right">Code</th><th style="text-align:right">Complexity</th></tr></thead><tbody><tr><td><em>C</em></td><td style="text-align:right">4</td><td style="text-align:right">458</td><td style="text-align:right">34</td><td style="text-align:right">58</td><td style="text-align:right">366</td><td style="text-align:right">33</td></tr><tr><td><code>test_maze.c</code></td><td style="text-align:right"></td><td style="text-align:right">225</td><td style="text-align:right">9</td><td style="text-align:right">0</td><td style="text-align:right">216</td><td style="text-align:right">4</td></tr><tr><td><code>sol.maze.c</code></td><td style="text-align:right"></td><td style="text-align:right">141</td><td style="text-align:right">15</td><td style="text-align:right">28</td><td style="text-align:right">98</td><td style="text-align:right">24</td></tr><tr><td><code>maze.c</code></td><td style="text-align:right"></td><td style="text-align:right">84</td><td style="text-align:right">8</td><td style="text-align:right">30</td><td style="text-align:right">46</td><td style="text-align:right">5</td></tr><tr><td><code>main.c</code></td><td style="text-align:right"></td><td style="text-align:right">8</td><td style="text-align:right">2</td><td style="text-align:right">0</td><td style="text-align:right">6</td><td style="text-align:right">0</td></tr><tr><td><em>C Header</em></td><td style="text-align:right">1</td><td style="text-align:right">33</td><td style="text-align:right">3</td><td style="text-align:right">19</td><td style="text-align:right">11</td><td style="text-align:right">0</td></tr><tr><td><code>maze.h</code></td><td style="text-align:right"></td><td style="text-align:right">33</td><td style="text-align:right">3</td><td style="text-align:right">19</td><td style="text-align:right">11</td><td style="text-align:right">0</td></tr><tr><td><em>CMake</em></td><td style="text-align:right">1</td><td style="text-align:right">25</td><td style="text-align:right">4</td><td style="text-align:right">6</td><td style="text-align:right">15</td><td style="text-align:right">2</td></tr><tr><td><code>CMakeLists.txt</code></td><td style="text-align:right"></td><td style="text-align:right">25</td><td style="text-align:right">4</td><td style="text-align:right">6</td><td style="text-align:right">15</td><td style="text-align:right">2</td></tr><tr><td><strong>Total</strong></td><td style="text-align:right">6</td><td style="text-align:right">516</td><td style="text-align:right">41</td><td style="text-align:right">83</td><td style="text-align:right">392</td><td style="text-align:right">35</td></tr></tbody></table>
</li>
<li>
<p>Majority of the line count in solution is caused by the formatting :)</p>
</li>
<li>
<p>Included headers can be interpreted as hints, same goes for the unimplemented
<code>static</code> functions which you can use, but <strong>are not required</strong>.</p>
</li>
<li>
<p>Given <code>CMakeLists.txt</code> will generate 2 binaries, <code>test_maze</code> and <code>maze</code>.</p>
<ul>
<li><code>test_maze</code> runs the tests you are given.</li>
<li><code>maze</code> runs the <code>main.c</code>, where you can debug, print mazes and whatever else
you want.</li>
</ul>
</li>
<li>
<p>I keep only one copy of <code>cut.h</code> in my repository, so you need to download it from
<a href="https://gitlab.fi.muni.cz/pb071/cut/-/jobs/159010/artifacts/file/1header/cut.h" target="_blank" rel="noopener noreferrer">here</a> and place it into the directory where you have your source code.</p>
<ul>
<li>Or you can use the one you have from the latest homework, git will keep it
only once, so it doesn&#x27;t take up more space.</li>
</ul>
</li>
<li>
<p>I would recommend cloning this repository and copying the <code>maze</code> directory to
your own repository, since there are multiple files and it may be easier for you.</p>
</li>
</ul>
<p>In case you have any questions, feel free to reach out to me.</p>
<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>For submitting the bonus assignment you can follow the same procedure as for
submitting the homeworks, that is:</p>
<ol>
<li>On branch <code>main</code> add the provided skeleton.</li>
<li>Checkout new branch <code>seminar-bonus-04</code>.</li>
<li>Add your solution to the newly created branch.</li>
<li>Create a MR to the <code>main</code> branch with me (<code>@xfocko</code>) as the reviewer.</li>
</ol></div><footer class="theme-doc-footer docusaurus-mt-lg"><div class="theme-doc-footer-edit-meta-row row"><div class="col"><a href="https://github.com/mfocko/blog/tree/main/c/bonuses/04.md" target="_blank" rel="noopener noreferrer" 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="2023-03-13T00:00:00.000Z">Mar 13, 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="/c/bonuses/seminar-03/"><div class="pagination-nav__sublabel">Previous</div><div class="pagination-nav__label">3rd seminar</div></a><a class="pagination-nav__link pagination-nav__link--next" href="/c/bonuses/seminar-05-06/"><div class="pagination-nav__sublabel">Next</div><div class="pagination-nav__label">5th and 6th 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="#hard-requirement" class="table-of-contents__link toc-highlight">Hard requirement</a></li><li><a href="#example-of-run" class="table-of-contents__link toc-highlight">Example of run</a></li><li><a href="#bonus-part" class="table-of-contents__link toc-highlight">Bonus part</a></li><li><a href="#easter-eggs" class="table-of-contents__link toc-highlight">Easter eggs</a></li><li><a href="#submitting" class="table-of-contents__link 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