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<div class="headertitle"><div class="title">skip_list.cpp</div></div>
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<a href="../../d0/d5a/skip__list_8cpp.html">Go to the documentation of this file.</a><div class="fragment"><div class="line"><a id="l00001" name="l00001"></a><span class="lineno"> 1</span> </div>
<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include &lt;array&gt;</span></div>
<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include &lt;cstring&gt;</span></div>
<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include &lt;ctime&gt;</span></div>
<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span><span class="preprocessor">#include &lt;iostream&gt;</span></div>
<div class="line"><a id="l00020" name="l00020"></a><span class="lineno"> 20</span><span class="preprocessor">#include &lt;memory&gt;</span></div>
<div class="line"><a id="l00021" name="l00021"></a><span class="lineno"> 21</span><span class="preprocessor">#include &lt;vector&gt;</span></div>
<div class="line"><a id="l00022" name="l00022"></a><span class="lineno"> 22</span> </div>
<div class="line"><a id="l00026" name="l00026"></a><span class="lineno"> 26</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d5/d3c/namespacedata__structures.html">data_structures</a> {</div>
<div class="line"><a id="l00027" name="l00027"></a><span class="lineno"><a class="line" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a"> 27</a></span><span class="keyword">constexpr</span> <span class="keywordtype">int</span> <a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">MAX_LEVEL</a> = 2; </div>
<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"><a class="line" href="../../d5/d3c/namespacedata__structures.html#a903639d8e6f955dd8d5c263781455d61"> 28</a></span><span class="keyword">constexpr</span> <span class="keywordtype">float</span> <a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#a903639d8e6f955dd8d5c263781455d61">PROBABILITY</a> = 0.5; </div>
<div class="line"><a id="l00029" name="l00029"></a><span class="lineno"> 29</span> </div>
<div class="foldopen" id="foldopen00033" data-start="{" data-end="};">
<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"><a class="line" href="../../d9/d49/structdata__structures_1_1_node.html"> 33</a></span><span class="keyword">struct </span><a class="code hl_struct" href="../../d9/d49/structdata__structures_1_1_node.html">Node</a> {</div>
<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"><a class="line" href="../../d9/d49/structdata__structures_1_1_node.html#ac75aa86a598357c5c882ec6a1174aa68"> 34</a></span> <span class="keywordtype">int</span> <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#ac75aa86a598357c5c882ec6a1174aa68">key</a>; </div>
<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"><a class="line" href="../../d9/d49/structdata__structures_1_1_node.html#a6b973b0bded99b0c0bd84e887bf8c731"> 35</a></span> <span class="keywordtype">void</span>* <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#a6b973b0bded99b0c0bd84e887bf8c731">value</a>; </div>
<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> std::vector&lt;std::shared_ptr&lt;Node&gt;&gt;</div>
<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"><a class="line" href="../../d9/d49/structdata__structures_1_1_node.html#ac916d833aad2b9c41f01a92db2f8c48e"> 37</a></span> <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#ac916d833aad2b9c41f01a92db2f8c48e">forward</a>; </div>
<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> </div>
<div class="foldopen" id="foldopen00044" data-start="{" data-end="}">
<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"><a class="line" href="../../d9/d49/structdata__structures_1_1_node.html#a54a6777e72b639c3ee6446a541db8e78"> 44</a></span> <a class="code hl_function" href="../../d9/d49/structdata__structures_1_1_node.html#a54a6777e72b639c3ee6446a541db8e78">Node</a>(<span class="keywordtype">int</span> <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#ac75aa86a598357c5c882ec6a1174aa68">key</a>, <span class="keywordtype">int</span> level, <span class="keywordtype">void</span>* <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#a6b973b0bded99b0c0bd84e887bf8c731">value</a> = <span class="keyword">nullptr</span>) : <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#ac75aa86a598357c5c882ec6a1174aa68">key</a>(<a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#ac75aa86a598357c5c882ec6a1174aa68">key</a>), <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#a6b973b0bded99b0c0bd84e887bf8c731">value</a>(<a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#a6b973b0bded99b0c0bd84e887bf8c731">value</a>) {</div>
<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// Initialization of forward vector</span></div>
<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt; (level + 1); i++) {</div>
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <a class="code hl_variable" href="../../d9/d49/structdata__structures_1_1_node.html#ac916d833aad2b9c41f01a92db2f8c48e">forward</a>.push_back(<span class="keyword">nullptr</span>);</div>
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> }</div>
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> }</div>
</div>
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span>};</div>
</div>
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> </div>
<div class="foldopen" id="foldopen00055" data-start="{" data-end="};">
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html"> 55</a></span><span class="keyword">class </span><a class="code hl_class" href="../../d4/d90/classdata__structures_1_1_skip_list.html">SkipList</a> {</div>
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650"> 56</a></span> <span class="keywordtype">int</span> <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>; </div>
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16"> 57</a></span> std::shared_ptr&lt;Node&gt; <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a>; </div>
<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> </div>
<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keyword">public</span>:</div>
<div class="foldopen" id="foldopen00064" data-start="{" data-end="}">
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a7ffc3688725b9d1ec6e5bb881a6e2ae4"> 64</a></span> <a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a7ffc3688725b9d1ec6e5bb881a6e2ae4">SkipList</a>() {</div>
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a> = 0;</div>
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="comment">// Header initialization</span></div>
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a> = std::make_shared&lt;Node&gt;(-1, <a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">MAX_LEVEL</a>);</div>
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> }</div>
</div>
<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> </div>
<div class="foldopen" id="foldopen00075" data-start="{" data-end="}">
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#aa3f3813e9896792fc86b296547689ba4"> 75</a></span> <span class="keywordtype">int</span> <a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#aa3f3813e9896792fc86b296547689ba4">randomLevel</a>() {</div>
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> <span class="keywordtype">int</span> lvl = 0;</div>
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">while</span> (<span class="keyword">static_cast&lt;</span><span class="keywordtype">float</span><span class="keyword">&gt;</span>(std::rand()) / RAND_MAX &lt; <a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#a903639d8e6f955dd8d5c263781455d61">PROBABILITY</a> &amp;&amp;</div>
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> lvl &lt; <a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">MAX_LEVEL</a>) {</div>
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> lvl++;</div>
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> }</div>
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="keywordflow">return</span> lvl;</div>
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> }</div>
</div>
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> </div>
<div class="foldopen" id="foldopen00090" data-start="{" data-end="}">
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a40a4042bdf0b6683b5f21ae7854de8a9"> 90</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a40a4042bdf0b6683b5f21ae7854de8a9">insertElement</a>(<span class="keywordtype">int</span> key, <span class="keywordtype">void</span>* value) {</div>
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Inserting&quot;</span> &lt;&lt; key &lt;&lt; <span class="stringliteral">&quot;...&quot;</span>;</div>
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> std::shared_ptr&lt;Node&gt; x = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a>;</div>
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> std::array&lt;std::shared_ptr&lt;Node&gt;, <a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">MAX_LEVEL</a> + 1&gt; <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>;</div>
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>.fill(<span class="keyword">nullptr</span>);</div>
<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> </div>
<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>; i &gt;= 0; i--) {</div>
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> <span class="keywordflow">while</span> (x-&gt;forward[i] != <span class="keyword">nullptr</span> &amp;&amp; x-&gt;forward[i]-&gt;key &lt; key) {</div>
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> x = x-&gt;forward[i];</div>
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> }</div>
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>[i] = x;</div>
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> }</div>
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> </div>
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> x = x-&gt;forward[0];</div>
<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <span class="keywordtype">bool</span> doesnt_exist = (x == <span class="keyword">nullptr</span> || x-&gt;key != key);</div>
<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="keywordflow">if</span> (doesnt_exist) {</div>
<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keywordtype">int</span> rlevel = <a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#aa3f3813e9896792fc86b296547689ba4">randomLevel</a>();</div>
<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> </div>
<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> <span class="keywordflow">if</span> (rlevel &gt; <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>) {</div>
<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a> + 1; i &lt; rlevel + 1; i++) <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>[i] = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a>;</div>
<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> </div>
<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <span class="comment">// Update current level</span></div>
<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a> = rlevel;</div>
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> }</div>
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> </div>
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> std::shared_ptr&lt;Node&gt; n =</div>
<div class="line"><a id="l00117" name="l00117"></a><span class="lineno"> 117</span> std::make_shared&lt;Node&gt;(key, rlevel, value);</div>
<div class="line"><a id="l00118" name="l00118"></a><span class="lineno"> 118</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt;= rlevel; i++) {</div>
<div class="line"><a id="l00119" name="l00119"></a><span class="lineno"> 119</span> n-&gt;forward[i] = <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>[i]-&gt;forward[i];</div>
<div class="line"><a id="l00120" name="l00120"></a><span class="lineno"> 120</span> <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>[i]-&gt;forward[i] = n;</div>
<div class="line"><a id="l00121" name="l00121"></a><span class="lineno"> 121</span> }</div>
<div class="line"><a id="l00122" name="l00122"></a><span class="lineno"> 122</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Inserted&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00123" name="l00123"></a><span class="lineno"> 123</span> </div>
<div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Exists&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> }</div>
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> }</div>
</div>
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> </div>
<div class="foldopen" id="foldopen00133" data-start="{" data-end="}">
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a86925c53e139cc6c3f7df1e9003bb0b0"> 133</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a86925c53e139cc6c3f7df1e9003bb0b0">deleteElement</a>(<span class="keywordtype">int</span> key) {</div>
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> std::shared_ptr&lt;Node&gt; x = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a>;</div>
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> </div>
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> std::array&lt;std::shared_ptr&lt;Node&gt;, <a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">MAX_LEVEL</a> + 1&gt; <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>;</div>
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>.fill(<span class="keyword">nullptr</span>);</div>
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> </div>
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>; i &gt;= 0; i--) {</div>
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> <span class="keywordflow">while</span> (x-&gt;forward[i] != <span class="keyword">nullptr</span> &amp;&amp; x-&gt;forward[i]-&gt;key &lt; key) {</div>
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> x = x-&gt;forward[i];</div>
<div class="line"><a id="l00142" name="l00142"></a><span class="lineno"> 142</span> }</div>
<div class="line"><a id="l00143" name="l00143"></a><span class="lineno"> 143</span> <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>[i] = x;</div>
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> }</div>
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> </div>
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> x = x-&gt;forward[0];</div>
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> </div>
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> <span class="keywordtype">bool</span> doesnt_exist = (x == <span class="keyword">nullptr</span> || x-&gt;key != key);</div>
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> </div>
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> <span class="keywordflow">if</span> (!doesnt_exist) {</div>
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt;= <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>; i++) {</div>
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>[i]-&gt;forward[i] != x) {</div>
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="keywordflow">break</span>;</div>
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> }</div>
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <a class="code hl_function" href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a>[i]-&gt;forward[i] = x-&gt;forward[i];</div>
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> }</div>
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> <span class="comment">/* Remove empty levels*/</span></div>
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> <span class="keywordflow">while</span> (<a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a> &gt; 0 &amp;&amp; <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a>-&gt;forward[<a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>] == <span class="keyword">nullptr</span>) <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>--;</div>
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Deleted&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Doesn&#39;t exist&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00162" name="l00162"></a><span class="lineno"> 162</span> }</div>
<div class="line"><a id="l00163" name="l00163"></a><span class="lineno"> 163</span> }</div>
</div>
<div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> </div>
<div class="foldopen" id="foldopen00170" data-start="{" data-end="}">
<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#af2f3d4e15b1f47afac849c2e08a730f4"> 170</a></span> <span class="keywordtype">void</span>* <a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#af2f3d4e15b1f47afac849c2e08a730f4">searchElement</a>(<span class="keywordtype">int</span> key) {</div>
<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> std::shared_ptr&lt;Node&gt; x = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a>;</div>
<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Searching for &quot;</span> &lt;&lt; key &lt;&lt; std::endl;</div>
<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> </div>
<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>; i &gt;= 0; i--) {</div>
<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="keywordflow">while</span> (x-&gt;forward[i] &amp;&amp; x-&gt;forward[i]-&gt;key &lt; key) x = x-&gt;forward[i];</div>
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> }</div>
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> </div>
<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> x = x-&gt;forward[0];</div>
<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span> <span class="keywordflow">if</span> (x &amp;&amp; x-&gt;key == key) {</div>
<div class="line"><a id="l00180" name="l00180"></a><span class="lineno"> 180</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Found&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00181" name="l00181"></a><span class="lineno"> 181</span> <span class="keywordflow">return</span> x-&gt;value;</div>
<div class="line"><a id="l00182" name="l00182"></a><span class="lineno"> 182</span> } <span class="keywordflow">else</span> {</div>
<div class="line"><a id="l00183" name="l00183"></a><span class="lineno"> 183</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Not Found&quot;</span> &lt;&lt; std::endl;</div>
<div class="line"><a id="l00184" name="l00184"></a><span class="lineno"> 184</span> <span class="keywordflow">return</span> <span class="keyword">nullptr</span>;</div>
<div class="line"><a id="l00185" name="l00185"></a><span class="lineno"> 185</span> }</div>
<div class="line"><a id="l00186" name="l00186"></a><span class="lineno"> 186</span> }</div>
</div>
<div class="line"><a id="l00187" name="l00187"></a><span class="lineno"> 187</span> </div>
<div class="foldopen" id="foldopen00191" data-start="{" data-end="}">
<div class="line"><a id="l00191" name="l00191"></a><span class="lineno"><a class="line" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a812611f80b8079268dbb19cc4e9bee5c"> 191</a></span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a812611f80b8079268dbb19cc4e9bee5c">displayList</a>() {</div>
<div class="line"><a id="l00192" name="l00192"></a><span class="lineno"> 192</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Displaying list:\n&quot;</span>;</div>
<div class="line"><a id="l00193" name="l00193"></a><span class="lineno"> 193</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i &lt;= <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">level</a>; i++) {</div>
<div class="line"><a id="l00194" name="l00194"></a><span class="lineno"> 194</span> std::shared_ptr&lt;Node&gt; <a class="code hl_class" href="../../d5/da1/structnode.html">node</a> = <a class="code hl_variable" href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">header</a>-&gt;forward[i];</div>
<div class="line"><a id="l00195" name="l00195"></a><span class="lineno"> 195</span> std::cout &lt;&lt; <span class="stringliteral">&quot;Level &quot;</span> &lt;&lt; (i) &lt;&lt; <span class="stringliteral">&quot;: &quot;</span>;</div>
<div class="line"><a id="l00196" name="l00196"></a><span class="lineno"> 196</span> <span class="keywordflow">while</span> (<a class="code hl_class" href="../../d5/da1/structnode.html">node</a> != <span class="keyword">nullptr</span>) {</div>
<div class="line"><a id="l00197" name="l00197"></a><span class="lineno"> 197</span> std::cout &lt;&lt; <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>-&gt;key &lt;&lt; <span class="stringliteral">&quot; &quot;</span>;</div>
<div class="line"><a id="l00198" name="l00198"></a><span class="lineno"> 198</span> <a class="code hl_class" href="../../d5/da1/structnode.html">node</a> = <a class="code hl_class" href="../../d5/da1/structnode.html">node</a>-&gt;forward[i];</div>
<div class="line"><a id="l00199" name="l00199"></a><span class="lineno"> 199</span> }</div>
<div class="line"><a id="l00200" name="l00200"></a><span class="lineno"> 200</span> std::cout &lt;&lt; std::endl;</div>
<div class="line"><a id="l00201" name="l00201"></a><span class="lineno"> 201</span> }</div>
<div class="line"><a id="l00202" name="l00202"></a><span class="lineno"> 202</span> }</div>
</div>
<div class="line"><a id="l00203" name="l00203"></a><span class="lineno"> 203</span>};</div>
</div>
<div class="line"><a id="l00204" name="l00204"></a><span class="lineno"> 204</span> </div>
<div class="line"><a id="l00205" name="l00205"></a><span class="lineno"> 205</span>} <span class="comment">// namespace data_structures</span></div>
<div class="line"><a id="l00206" name="l00206"></a><span class="lineno"> 206</span> </div>
<div class="foldopen" id="foldopen00212" data-start="{" data-end="}">
<div class="line"><a id="l00212" name="l00212"></a><span class="lineno"><a class="line" href="../../d0/d5a/skip__list_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 212</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d0/d5a/skip__list_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
<div class="line"><a id="l00213" name="l00213"></a><span class="lineno"> 213</span> std::srand(std::time(<span class="keyword">nullptr</span>));</div>
<div class="line"><a id="l00214" name="l00214"></a><span class="lineno"> 214</span> </div>
<div class="line"><a id="l00215" name="l00215"></a><span class="lineno"> 215</span> <a class="code hl_class" href="../../d4/d90/classdata__structures_1_1_skip_list.html">data_structures::SkipList</a> lst;</div>
<div class="line"><a id="l00216" name="l00216"></a><span class="lineno"> 216</span> </div>
<div class="line"><a id="l00217" name="l00217"></a><span class="lineno"> 217</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j &lt; (1 &lt;&lt; (<a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">data_structures::MAX_LEVEL</a> + 1)); j++) {</div>
<div class="line"><a id="l00218" name="l00218"></a><span class="lineno"> 218</span> <span class="keywordtype">int</span> k = (std::rand() % (1 &lt;&lt; (<a class="code hl_variable" href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">data_structures::MAX_LEVEL</a> + 2)) + 1);</div>
<div class="line"><a id="l00219" name="l00219"></a><span class="lineno"> 219</span> lst.<a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a40a4042bdf0b6683b5f21ae7854de8a9">insertElement</a>(k, &amp;j);</div>
<div class="line"><a id="l00220" name="l00220"></a><span class="lineno"> 220</span> }</div>
<div class="line"><a id="l00221" name="l00221"></a><span class="lineno"> 221</span> </div>
<div class="line"><a id="l00222" name="l00222"></a><span class="lineno"> 222</span> lst.<a class="code hl_function" href="../../d4/d90/classdata__structures_1_1_skip_list.html#a812611f80b8079268dbb19cc4e9bee5c">displayList</a>();</div>
<div class="line"><a id="l00223" name="l00223"></a><span class="lineno"> 223</span> </div>
<div class="line"><a id="l00224" name="l00224"></a><span class="lineno"> 224</span> <span class="keywordflow">return</span> 0;</div>
<div class="line"><a id="l00225" name="l00225"></a><span class="lineno"> 225</span>}</div>
</div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html">data_structures::SkipList</a></div><div class="ttdef"><b>Definition</b> <a href="#l00055">skip_list.cpp:55</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_a3e249c2c35a8b7f5ffd2d77fee60d650"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#a3e249c2c35a8b7f5ffd2d77fee60d650">data_structures::SkipList::level</a></div><div class="ttdeci">int level</div><div class="ttdoc">Maximum level of the skiplist.</div><div class="ttdef"><b>Definition</b> <a href="#l00056">skip_list.cpp:56</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_a40a4042bdf0b6683b5f21ae7854de8a9"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#a40a4042bdf0b6683b5f21ae7854de8a9">data_structures::SkipList::insertElement</a></div><div class="ttdeci">void insertElement(int key, void *value)</div><div class="ttdef"><b>Definition</b> <a href="#l00090">skip_list.cpp:90</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_a7ffc3688725b9d1ec6e5bb881a6e2ae4"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#a7ffc3688725b9d1ec6e5bb881a6e2ae4">data_structures::SkipList::SkipList</a></div><div class="ttdeci">SkipList()</div><div class="ttdef"><b>Definition</b> <a href="#l00064">skip_list.cpp:64</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_a812611f80b8079268dbb19cc4e9bee5c"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#a812611f80b8079268dbb19cc4e9bee5c">data_structures::SkipList::displayList</a></div><div class="ttdeci">void displayList()</div><div class="ttdef"><b>Definition</b> <a href="#l00191">skip_list.cpp:191</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_a86925c53e139cc6c3f7df1e9003bb0b0"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#a86925c53e139cc6c3f7df1e9003bb0b0">data_structures::SkipList::deleteElement</a></div><div class="ttdeci">void deleteElement(int key)</div><div class="ttdef"><b>Definition</b> <a href="#l00133">skip_list.cpp:133</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_aa3f3813e9896792fc86b296547689ba4"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#aa3f3813e9896792fc86b296547689ba4">data_structures::SkipList::randomLevel</a></div><div class="ttdeci">int randomLevel()</div><div class="ttdef"><b>Definition</b> <a href="#l00075">skip_list.cpp:75</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_ad7e392386d7db622185d6f7c718e4f16"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#ad7e392386d7db622185d6f7c718e4f16">data_structures::SkipList::header</a></div><div class="ttdeci">std::shared_ptr&lt; Node &gt; header</div><div class="ttdoc">Pointer to the header node.</div><div class="ttdef"><b>Definition</b> <a href="#l00057">skip_list.cpp:57</a></div></div>
<div class="ttc" id="aclassdata__structures_1_1_skip_list_html_af2f3d4e15b1f47afac849c2e08a730f4"><div class="ttname"><a href="../../d4/d90/classdata__structures_1_1_skip_list.html#af2f3d4e15b1f47afac849c2e08a730f4">data_structures::SkipList::searchElement</a></div><div class="ttdeci">void * searchElement(int key)</div><div class="ttdef"><b>Definition</b> <a href="#l00170">skip_list.cpp:170</a></div></div>
<div class="ttc" id="anamespacedata__structures_html"><div class="ttname"><a href="../../d5/d3c/namespacedata__structures.html">data_structures</a></div><div class="ttdoc">for IO operations</div></div>
<div class="ttc" id="anamespacedata__structures_html_a903639d8e6f955dd8d5c263781455d61"><div class="ttname"><a href="../../d5/d3c/namespacedata__structures.html#a903639d8e6f955dd8d5c263781455d61">data_structures::PROBABILITY</a></div><div class="ttdeci">constexpr float PROBABILITY</div><div class="ttdoc">Current probability for &quot;coin toss&quot;.</div><div class="ttdef"><b>Definition</b> <a href="#l00028">skip_list.cpp:28</a></div></div>
<div class="ttc" id="anamespacedata__structures_html_ac0d7e0be24da9f41bcb19745873c436a"><div class="ttname"><a href="../../d5/d3c/namespacedata__structures.html#ac0d7e0be24da9f41bcb19745873c436a">data_structures::MAX_LEVEL</a></div><div class="ttdeci">constexpr int MAX_LEVEL</div><div class="ttdoc">Maximum level of skip list.</div><div class="ttdef"><b>Definition</b> <a href="#l00027">skip_list.cpp:27</a></div></div>
<div class="ttc" id="asegtree_8cpp_html_abd3e818681fb2e29cf08f4f60f82c8e0"><div class="ttname"><a href="../../d2/d45/segtree_8cpp.html#abd3e818681fb2e29cf08f4f60f82c8e0">update</a></div><div class="ttdeci">void update(std::vector&lt; int64_t &gt; *segtree, std::vector&lt; int64_t &gt; *lazy, int64_t start, int64_t end, int64_t delta, uint64_t low, uint64_t high, uint64_t pos)</div><div class="ttdoc">Updates a range of the segment tree.</div><div class="ttdef"><b>Definition</b> <a href="../../d2/d45/segtree_8cpp_source.html#l00103">segtree.cpp:103</a></div></div>
<div class="ttc" id="askip__list_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d0/d5a/skip__list_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdef"><b>Definition</b> <a href="#l00212">skip_list.cpp:212</a></div></div>
<div class="ttc" id="astructdata__structures_1_1_node_html"><div class="ttname"><a href="../../d9/d49/structdata__structures_1_1_node.html">data_structures::Node</a></div><div class="ttdef"><b>Definition</b> <a href="#l00033">skip_list.cpp:33</a></div></div>
<div class="ttc" id="astructdata__structures_1_1_node_html_a54a6777e72b639c3ee6446a541db8e78"><div class="ttname"><a href="../../d9/d49/structdata__structures_1_1_node.html#a54a6777e72b639c3ee6446a541db8e78">data_structures::Node::Node</a></div><div class="ttdeci">Node(int key, int level, void *value=nullptr)</div><div class="ttdef"><b>Definition</b> <a href="#l00044">skip_list.cpp:44</a></div></div>
<div class="ttc" id="astructdata__structures_1_1_node_html_a6b973b0bded99b0c0bd84e887bf8c731"><div class="ttname"><a href="../../d9/d49/structdata__structures_1_1_node.html#a6b973b0bded99b0c0bd84e887bf8c731">data_structures::Node::value</a></div><div class="ttdeci">void * value</div><div class="ttdoc">pointer of value</div><div class="ttdef"><b>Definition</b> <a href="#l00035">skip_list.cpp:35</a></div></div>
<div class="ttc" id="astructdata__structures_1_1_node_html_ac75aa86a598357c5c882ec6a1174aa68"><div class="ttname"><a href="../../d9/d49/structdata__structures_1_1_node.html#ac75aa86a598357c5c882ec6a1174aa68">data_structures::Node::key</a></div><div class="ttdeci">int key</div><div class="ttdoc">key integer</div><div class="ttdef"><b>Definition</b> <a href="#l00034">skip_list.cpp:34</a></div></div>
<div class="ttc" id="astructdata__structures_1_1_node_html_ac916d833aad2b9c41f01a92db2f8c48e"><div class="ttname"><a href="../../d9/d49/structdata__structures_1_1_node.html#ac916d833aad2b9c41f01a92db2f8c48e">data_structures::Node::forward</a></div><div class="ttdeci">std::vector&lt; std::shared_ptr&lt; Node &gt; &gt; forward</div><div class="ttdoc">nodes of the given one in all levels</div><div class="ttdef"><b>Definition</b> <a href="#l00037">skip_list.cpp:37</a></div></div>
<div class="ttc" id="astructnode_html"><div class="ttname"><a href="../../d5/da1/structnode.html">node</a></div><div class="ttdef"><b>Definition</b> <a href="../../d3/d26/binary__search__tree_8cpp_source.html#l00011">binary_search_tree.cpp:11</a></div></div>
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