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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/pb071/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:#000000;--prism-background-color:#ffffff"><div class="codeBlockContent_biex"><pre tabindex="0" class="prism-code language-c codeBlock_bY9V thin-scrollbar"><code class="codeBlockLines_e6Vv"><span class="token-line" style="color:#000000"><span class="token keyword" style="color:rgb(0, 0, 255)">const</span><span class="token plain"> </span><span class="token keyword" style="color:rgb(0, 0, 255)">char</span><span class="token plain"> </span><span class="token operator" style="color:rgb(0, 0, 0)">*</span><span class="token plain">map </span><span class="token operator" style="color:rgb(0, 0, 0)">=</span><span class="token plain"> </span><span class="token punctuation" style="color:rgb(4, 81, 165)">(</span><span class="token plain"></span><br></span><span class="token-line" style="color:#000000"><span class="token plain"> </span><span class="token string" style="color:rgb(163, 21, 21)">&quot;&gt;.v&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#000000"><span class="token plain"> </span><span class="token string" style="color:rgb(163, 21, 21)">&quot;.K&lt;&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#000000"><span class="token plain"> </span><span class="token string" style="color:rgb(163, 21, 21)">&quot;...&quot;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#000000"><span class="token plain"></span><span class="token punctuation" style="color:rgb(4, 81, 165)">)</span><span class="token punctuation" style="color:rgb(4, 81, 165)">;</span><span class="token plain"></span><br></span><span class="token-line" style="color:#000000"><span class="token plain" style="display:inline-block"></span><br></span><span class="token-line" style="color:#000000"><span class="token plain"></span><span class="token function" style="color:rgb(0, 0, 255)">walk</span><span class="token punctuation" style="color:rgb(4, 81, 165)">(</span><span class="token plain">map</span><span class="token punctuation" style="color:rgb(4, 81, 165)">,</span><span class="token plain"> </span><span class="token operator" style="color:rgb(0, 0, 0)">&amp;</span><span class="token plain">map</span><span class="token punctuation" style="color:rgb(4, 81, 165)">[</span><span class="token number" style="color:rgb(9, 134, 88)">6</span><span class="token punctuation" style="color:rgb(4, 81, 165)">]</span><span class="token punctuation" style="color:rgb(4, 81, 165)">,</span><span class="token plain"> </span><span class="token char" style="color:rgb(129, 31, 63)">&#x27;^&#x27;</span><span class="token punctuation" style="color:rgb(4, 81, 165)">,</span><span class="token plain"> </span><span class="token number" style="color:rgb(9, 134, 88)">3</span><span class="token punctuation" style="color:rgb(4, 81, 165)">,</span><span class="token plain"> </span><span class="token number" style="color:rgb(9, 134, 88)">3</span><span class="token punctuation" style="color:rgb(4, 81, 165)">)</span><span class="token punctuation" style="color:rgb(4, 81, 165)">;</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:#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">&gt;.v</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">.K&lt;</span><br></span><span class="token-line" style="color:#000000"><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:#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">&gt;.v</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">NK&lt;</span><br></span><span class="token-line" style="color:#000000"><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:#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">E.v</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">.K&lt;</span><br></span><span class="token-line" style="color:#000000"><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:#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">&gt;Ev</span><br></span><span class="token-line" style="color:#000000"><span class="token plain">.K&lt;</span><br></span><span class="token-line"
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 align="right">Files</th><th align="right">Lines</th><th align="right">Blanks</th><th align="right">Comments</th><th align="right">Code</th><th align="right">Complexity</th></tr></thead><tbody><tr><td><em>C</em></td><td align="right">4</td><td align="right">458</td><td align="right">34</td><td align="right">58</td><td align="right">366</td><td align="right">33</td></tr><tr><td><code>test_maze.c</code></td><td align="right"></td><td align="right">225</td><td align="right">9</td><td align="right">0</td><td align="right">216</td><td align="right">4</td></tr><tr><td><code>sol.maze.c</code></td><td align="right"></td><td align="right">141</td><td align="right">15</td><td align="right">28</td><td align="right">98</td><td align="right">24</td></tr><tr><td><code>maze.c</code></td><td align="right"></td><td align="right">84</td><td align="right">8</td><td align="right">30</td><td align="right">46</td><td align="right">5</td></tr><tr><td><code>main.c</code></td><td align="right"></td><td align="right">8</td><td align="right">2</td><td align="right">0</td><td align="right">6</td><td align="right">0</td></tr><tr><td><em>C Header</em></td><td align="right">1</td><td align="right">33</td><td align="right">3</td><td align="right">19</td><td align="right">11</td><td align="right">0</td></tr><tr><td><code>maze.h</code></td><td align="right"></td><td align="right">33</td><td align="right">3</td><td align="right">19</td><td align="right">11</td><td align="right">0</td></tr><tr><td><em>CMake</em></td><td align="right">1</td><td align="right">25</td><td align="right">4</td><td align="right">6</td><td align="right">15</td><td align="right">2</td></tr><tr><td><code>CMakeLists.txt</code></td><td align="right"></td><td align="right">25</td><td align="right">4</td><td align="right">6</td><td align="right">15</td><td align="right">2</td></tr><tr><td><strong>Total</strong></td><td align="right">6</td><td align="right">516</td><td align="right">41</td><td align="right">83</td><td align="right">392</td><td 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/pb071/bonuses/04.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="2023-03-13T00:00:00.000Z">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="/pb071/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="/pb071/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 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 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://gitlab.com/mfocko" target="_blank" rel="noopener noreferrer" class="footer__link-item">GitLab<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 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li><li class="footer__item"><a href="https://git.mfocko.xyz/mfocko" target="_blank" rel="noopener noreferrer" class="footer__link-item">Gitea (self-hosted)<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 2.828 6.977-7.07 4.125 4.172v-11z"></path></svg></a></li></ul></div><div class="col footer__col"><div class="footer__title">Social #1</div><ul class="footer__items clean-list"><li class="footer__item"><a href="https://www.linkedin.com/in/mfocko/" target="_blank" rel="noopener noreferrer" class="footer__link-item">LinkedIn<svg width="13.5" height="13.5" aria-hidden="tr
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