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<div class="headertitle"><div class="title">saddleback_search.cpp</div></div>
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<a href="../../d3/d22/saddleback__search_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>
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<div class="line"><a id="l00015" name="l00015"></a><span class="lineno"> 15</span><span class="preprocessor">#include <cassert></span> </div>
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<div class="line"><a id="l00016" name="l00016"></a><span class="lineno"> 16</span><span class="preprocessor">#include <cstdint></span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="preprocessor">#include <iostream></span> </div>
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<div class="line"><a id="l00018" name="l00018"></a><span class="lineno"> 18</span><span class="preprocessor">#include <vector></span> </div>
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<div class="line"><a id="l00019" name="l00019"></a><span class="lineno"> 19</span> </div>
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<div class="line"><a id="l00023" name="l00023"></a><span class="lineno"> 23</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d9/dca/namespacesearch.html">search</a> {</div>
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<div class="line"><a id="l00028" name="l00028"></a><span class="lineno"> 28</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../d0/dda/namespacesaddleback.html">saddleback</a> {</div>
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<div class="foldopen" id="foldopen00039" data-start="{" data-end="}">
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"><a class="line" href="../../d3/d22/saddleback__search_8cpp.html#ad1e0ca34797d88490747c08eca70a2e6"> 39</a></span>std::pair<uint32_t, uint32_t> <a class="code hl_namespace" href="../../d0/dda/namespacesaddleback.html">saddleback</a>(</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span> std::vector<std::vector<int32_t>> <a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>, int32_t element) {</div>
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<div class="line"><a id="l00041" name="l00041"></a><span class="lineno"> 41</span> uint32_t left_index = 0;</div>
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<div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> uint32_t right_index = <a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>[0].size() - 1; <span class="comment">// Start from top right corner</span></div>
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<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> <span class="keywordflow">while</span> (left_index <</div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>.size()) { <span class="comment">// Exit once the value of indexes get out of range.</span></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="keywordflow">if</span> (element ==</div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>[left_index]</div>
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<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> [right_index]) { <span class="comment">// If value on this position of matrix is</span></div>
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<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> <span class="comment">// equal to element, return (row, column).</span></div>
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<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">return</span> std::make_pair(left_index + 1, right_index + 1);</div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (element ></div>
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> <a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>[left_index]</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> [right_index]) { <span class="comment">// Else if value on this position of</span></div>
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<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="comment">// matrix is less than the element,</span></div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="comment">// move left.</span></div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> ++left_index;</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> } <span class="keywordflow">else</span> <span class="keywordflow">if</span> (element <</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>[left_index]</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> [right_index]) { <span class="comment">// Else if value on this position of</span></div>
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<div class="line"><a id="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="comment">// matrix is greater than the</span></div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="comment">// element, move down.</span></div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">if</span> (!right_index)</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">break</span>;</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> <span class="keywordflow">else</span></div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> --right_index;</div>
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<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> }</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> }</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">return</span> std::make_pair(</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> 0, 0); <span class="comment">// If the program reaches here, that means one of the index</span></div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</span> <span class="comment">// went out of index, hence no element present.</span></div>
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<div class="line"><a id="l00070" name="l00070"></a><span class="lineno"> 70</span>}</div>
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</div>
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<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span>} <span class="comment">// namespace saddleback</span></div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span>} <span class="comment">// namespace search</span></div>
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<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> </div>
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<div class="foldopen" id="foldopen00078" data-start="{" data-end="}">
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<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"><a class="line" href="../../d3/d22/saddleback__search_8cpp.html#aa8dca7b867074164d5f45b0f3851269d"> 78</a></span><span class="keyword">static</span> <span class="keywordtype">void</span> <a class="code hl_function" href="../../d3/d22/saddleback__search_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>() {</div>
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<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> std::vector<std::vector<int32_t>> <a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a> = {{1, 10, 100, 1000, 10000},</div>
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<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> {2, 20, 200, 2000, 20000},</div>
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> {3, 30, 300, 3000, 30000},</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> {4, 40, 400, 4000, 40000},</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> {5, 50, 500, 5000, 50000}};</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> </div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> std::pair<uint32_t, uint32_t> not_found = std::make_pair(0, 0);</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> std::pair<uint32_t, uint32_t> test_answer;</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="comment">// Test 1</span></div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> std::pair<uint32_t, uint32_t> answer1 =</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> search::saddleback::saddleback(<a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>, 123);</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> assert(not_found == answer1);</div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> <span class="comment">// Test 2</span></div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> answer1 = search::saddleback::saddleback(<a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>, 0);</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> assert(not_found == answer1);</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> <span class="comment">// Test 3</span></div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span> answer1 = search::saddleback::saddleback(<a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>, 1);</div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span> test_answer = std::make_pair(1, 1);</div>
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<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> assert(test_answer == answer1);</div>
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<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> <span class="comment">// Test 4</span></div>
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<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> answer1 = search::saddleback::saddleback(<a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>, 50000);</div>
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<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> test_answer = std::make_pair(5, 5);</div>
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> assert(test_answer == answer1);</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="comment">// Test 5</span></div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> answer1 = search::saddleback::saddleback(<a class="code hl_typedef" href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a>, 300);</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> test_answer = std::make_pair(3, 3);</div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> assert(test_answer == answer1);</div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span>}</div>
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</div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> </div>
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<div class="foldopen" id="foldopen00112" data-start="{" data-end="}">
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"><a class="line" href="../../d3/d22/saddleback__search_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 112</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d3/d22/saddleback__search_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <a class="code hl_function" href="../../d3/d22/saddleback__search_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// execute the tests</span></div>
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<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span>}</div>
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</div>
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<div class="ttc" id="alu__decomposition_8h_html_ac029b636b353cefbb18b2fcc71e427e4"><div class="ttname"><a href="../../d1/dbe/lu__decomposition_8h.html#ac029b636b353cefbb18b2fcc71e427e4">matrix</a></div><div class="ttdeci">std::vector< std::valarray< T > > matrix</div><div class="ttdef"><b>Definition</b> <a href="../../d1/dbe/lu__decomposition_8h_source.html#l00019">lu_decomposition.h:19</a></div></div>
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<div class="ttc" id="anamespacesaddleback_html"><div class="ttname"><a href="../../d0/dda/namespacesaddleback.html">saddleback</a></div><div class="ttdoc">Function for implementing Saddleback Algorithm.</div></div>
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<div class="ttc" id="anamespacesearch_html"><div class="ttname"><a href="../../d9/dca/namespacesearch.html">search</a></div><div class="ttdoc">for std::assert</div><div class="ttdef"><b>Definition</b> <a href="../../df/dd5/binary__search_8cpp_source.html#l00047">binary_search.cpp:47</a></div></div>
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<div class="ttc" id="asaddleback__search_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="../../d3/d22/saddleback__search_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Test implementations.</div><div class="ttdef"><b>Definition</b> <a href="#l00078">saddleback_search.cpp:78</a></div></div>
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<div class="ttc" id="asaddleback__search_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d3/d22/saddleback__search_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a></div><div class="ttdeci">int main()</div><div class="ttdoc">Main function.</div><div class="ttdef"><b>Definition</b> <a href="#l00112">saddleback_search.cpp:112</a></div></div>
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