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<p>Implementation of the <a href="https://www.geeksforgeeks.org/trapping-rain-water/" target="_blank">Trapped Rainwater Problem</a>
<a href="#details">More...</a></p>
<div class="textblock"><code>#include &lt;algorithm&gt;</code><br />
<code>#include &lt;cassert&gt;</code><br />
<code>#include &lt;cstddef&gt;</code><br />
<code>#include &lt;cstdint&gt;</code><br />
<code>#include &lt;vector&gt;</code><br />
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Include dependency graph for trapped_rainwater.cpp:</div>
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Namespaces</h2></td></tr>
<tr class="memitem:"><td class="memItemLeft" align="right" valign="top">namespace &#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/d24/namespacedynamic__programming.html">dynamic_programming</a></td></tr>
<tr class="memdesc:dd/d24/namespacedynamic__programming"><td class="mdescLeft">&#160;</td><td class="mdescRight">Dynamic Programming algorithms. <br /></td></tr>
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Functions</h2></td></tr>
<tr class="memitem:a066e0e739e7c276eee6e61d5b4d37ce8" id="r_a066e0e739e7c276eee6e61d5b4d37ce8"><td class="memItemLeft" align="right" valign="top">uint32_t&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a> (const <a class="elRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a>&lt; uint32_t &gt; &amp;heights)</td></tr>
<tr class="memdesc:a066e0e739e7c276eee6e61d5b4d37ce8"><td class="mdescLeft">&#160;</td><td class="mdescRight">Function to calculate the trapped rainwater. <br /></td></tr>
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<tr class="memitem:aa8dca7b867074164d5f45b0f3851269d" id="r_aa8dca7b867074164d5f45b0f3851269d"><td class="memItemLeft" align="right" valign="top">static void&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#aa8dca7b867074164d5f45b0f3851269d">test</a> ()</td></tr>
<tr class="memdesc:aa8dca7b867074164d5f45b0f3851269d"><td class="mdescLeft">&#160;</td><td class="mdescRight">Self-test implementations. <br /></td></tr>
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<tr class="memitem:ae66f6b31b5ad750f1fe042a706a4e3d4" id="r_ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="memItemLeft" align="right" valign="top">int&#160;</td><td class="memItemRight" valign="bottom"><a class="el" href="#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a> ()</td></tr>
<tr class="memdesc:ae66f6b31b5ad750f1fe042a706a4e3d4"><td class="mdescLeft">&#160;</td><td class="mdescRight">Main function. <br /></td></tr>
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<a name="details" id="details"></a><h2 class="groupheader">Detailed Description</h2>
<div class="textblock"><p>Implementation of the <a href="https://www.geeksforgeeks.org/trapping-rain-water/" target="_blank">Trapped Rainwater Problem</a> </p>
<p>This implementation calculates the amount of rainwater that can be trapped between walls represented by an array of heights. </p><dl class="section author"><dt>Author</dt><dd><a href="https://github.com/TruongNhanNguyen" target="_blank">SOZEL</a> </dd></dl>
</div><h2 class="groupheader">Function Documentation</h2>
<a id="ae66f6b31b5ad750f1fe042a706a4e3d4" name="ae66f6b31b5ad750f1fe042a706a4e3d4"></a>
<h2 class="memtitle"><span class="permalink"><a href="#ae66f6b31b5ad750f1fe042a706a4e3d4">&#9670;&#160;</a></span>main()</h2>
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<td class="memname">int main </td>
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<p>Main function. </p>
<dl class="section return"><dt>Returns</dt><dd>0 on exit </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 101</span> {</div>
<div class="line"><span class="lineno"> 102</span> <a class="code hl_function" href="#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
<div class="line"><span class="lineno"> 103</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><span class="lineno"> 104</span>}</div>
<div class="ttc" id="atrapped__rainwater_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Self-test implementations.</div><div class="ttdef"><b>Definition</b> trapped_rainwater.cpp:62</div></div>
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<h2 class="memtitle"><span class="permalink"><a href="#aa8dca7b867074164d5f45b0f3851269d">&#9670;&#160;</a></span>test()</h2>
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<td class="memname">static void test </td>
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<p>Self-test implementations. </p>
<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
<div class="fragment"><div class="line"><span class="lineno"> 62</span> {</div>
<div class="line"><span class="lineno"> 63</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_basic = {0, 1, 0, 2, 1, 0, 1, 3, 2, 1, 2, 1};</div>
<div class="line"><span class="lineno"> 64</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_basic) == 6);</div>
<div class="line"><span class="lineno"> 65</span> </div>
<div class="line"><span class="lineno"> 66</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_peak_under_water = {3, 0, 2, 0, 4};</div>
<div class="line"><span class="lineno"> 67</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_peak_under_water) == 7);</div>
<div class="line"><span class="lineno"> 68</span> </div>
<div class="line"><span class="lineno"> 69</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_bucket = {5, 1, 5};</div>
<div class="line"><span class="lineno"> 70</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_bucket) == 4);</div>
<div class="line"><span class="lineno"> 71</span> </div>
<div class="line"><span class="lineno"> 72</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_skewed_bucket = {4, 1, 5};</div>
<div class="line"><span class="lineno"> 73</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_skewed_bucket) == 3);</div>
<div class="line"><span class="lineno"> 74</span> </div>
<div class="line"><span class="lineno"> 75</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_empty = {};</div>
<div class="line"><span class="lineno"> 76</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_empty) == 0);</div>
<div class="line"><span class="lineno"> 77</span> </div>
<div class="line"><span class="lineno"> 78</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_flat = {0, 0, 0, 0, 0};</div>
<div class="line"><span class="lineno"> 79</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_flat) == 0);</div>
<div class="line"><span class="lineno"> 80</span> </div>
<div class="line"><span class="lineno"> 81</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_no_trapped_water = {1, 1, 2, 4, 0, 0, 0};</div>
<div class="line"><span class="lineno"> 82</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_no_trapped_water) == 0);</div>
<div class="line"><span class="lineno"> 83</span> </div>
<div class="line"><span class="lineno"> 84</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_single_elevation = {5};</div>
<div class="line"><span class="lineno"> 85</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_single_elevation) == 0);</div>
<div class="line"><span class="lineno"> 86</span> </div>
<div class="line"><span class="lineno"> 87</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_two_point_elevation = {5, 1};</div>
<div class="line"><span class="lineno"> 88</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(test_two_point_elevation) ==</div>
<div class="line"><span class="lineno"> 89</span> 0);</div>
<div class="line"><span class="lineno"> 90</span> </div>
<div class="line"><span class="lineno"> 91</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector&lt;uint32_t&gt;</a> test_large_elevation_map_difference = {5, 1, 6, 1,</div>
<div class="line"><span class="lineno"> 92</span> 7, 1, 8};</div>
<div class="line"><span class="lineno"> 93</span> assert(<a class="code hl_function" href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a>(</div>
<div class="line"><span class="lineno"> 94</span> test_large_elevation_map_difference) == 15);</div>
<div class="line"><span class="lineno"> 95</span>}</div>
<div class="ttc" id="anamespacedynamic__programming_html_a066e0e739e7c276eee6e61d5b4d37ce8"><div class="ttname"><a href="../../dd/d24/namespacedynamic__programming.html#a066e0e739e7c276eee6e61d5b4d37ce8">dynamic_programming::trappedRainwater</a></div><div class="ttdeci">uint32_t trappedRainwater(const std::vector&lt; uint32_t &gt; &amp;heights)</div><div class="ttdoc">Function to calculate the trapped rainwater.</div><div class="ttdef"><b>Definition</b> trapped_rainwater.cpp:27</div></div>
<div class="ttc" id="avector_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector</a></div></div>
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