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<title>TheAlgorithms/C++: backtracking/subarray_sum.cpp File Reference</title>
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@@ -244,13 +244,12 @@ Functions</h2></td></tr>
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<div class="line"><span class="lineno"> 52</span> }</div>
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<div class="line"><span class="lineno"> 53</span> <span class="comment">// If in case current_sum is greater than the required sum</span></div>
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<div class="line"><span class="lineno"> 54</span> <span class="keywordflow">if</span> (sumarray.find(current_sum - sum) != sumarray.end()) {</div>
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<div class="line"><span class="lineno"> 55</span> count_of_subset += (sumarray[current_sum - <a class="code hl_function" href="../../d8/d77/namespacemachine__learning.html#a6f1c98c016ad34ff3d9f39372161bd35">sum</a>]);</div>
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<div class="line"><span class="lineno"> 55</span> count_of_subset += (sumarray[current_sum - sum]);</div>
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<div class="line"><span class="lineno"> 56</span> }</div>
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<div class="line"><span class="lineno"> 57</span> sumarray[current_sum]++;</div>
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<div class="line"><span class="lineno"> 58</span> }</div>
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<div class="line"><span class="lineno"> 59</span> <span class="keywordflow">return</span> count_of_subset;</div>
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<div class="line"><span class="lineno"> 60</span>}</div>
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<div class="ttc" id="anamespacemachine__learning_html_a6f1c98c016ad34ff3d9f39372161bd35"><div class="ttname"><a href="../../d8/d77/namespacemachine__learning.html#a6f1c98c016ad34ff3d9f39372161bd35">machine_learning::sum</a></div><div class="ttdeci">T sum(const std::vector< std::valarray< T > > &A)</div><div class="ttdef"><b>Definition</b> <a href="../../d8/d95/vector__ops_8hpp_source.html#l00232">vector_ops.hpp:232</a></div></div>
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@@ -272,7 +271,7 @@ Functions</h2></td></tr>
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<td class="mlabels-right">
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<span class="mlabels"><span class="mlabel">static</span></span> </td>
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<span class="mlabels"><span class="mlabel static">static</span></span> </td>
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@@ -286,7 +285,7 @@ Functions</h2></td></tr>
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<div class="line"><span class="lineno"> 70</span> std::cout << <span class="stringliteral">"1st test "</span>;</div>
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<div class="line"><span class="lineno"> 71</span> std::vector<int64_t> array1 = {-7, -3, -2, 5, 8}; <span class="comment">// input array</span></div>
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<div class="line"><span class="lineno"> 72</span> assert(</div>
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<div class="line"><span class="lineno"> 73</span> backtracking::subarray_sum::subarray_sum(0, array1) ==</div>
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<div class="line"><span class="lineno"> 73</span> <a class="code hl_function" href="#af5687bbd9faf927fbd363c71e0baba5e">backtracking::subarray_sum::subarray_sum</a>(0, array1) ==</div>
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<div class="line"><span class="lineno"> 74</span> 1); <span class="comment">// first argument in subarray_sum function is the required sum and</span></div>
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<div class="line"><span class="lineno"> 75</span> <span class="comment">// second is the input array, answer is the subarray {(-3,-2,5)}</span></div>
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<div class="line"><span class="lineno"> 76</span> std::cout << <span class="stringliteral">"passed"</span> << std::endl;</div>
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@@ -294,7 +293,7 @@ Functions</h2></td></tr>
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<div class="line"><span class="lineno"> 78</span> <span class="comment">// 2nd test</span></div>
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<div class="line"><span class="lineno"> 79</span> std::cout << <span class="stringliteral">"2nd test "</span>;</div>
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<div class="line"><span class="lineno"> 80</span> std::vector<int64_t> array2 = {1, 2, 3, 3};</div>
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<div class="line"><span class="lineno"> 81</span> assert(backtracking::subarray_sum::subarray_sum(6, array2) ==</div>
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<div class="line"><span class="lineno"> 81</span> assert(<a class="code hl_function" href="#af5687bbd9faf927fbd363c71e0baba5e">backtracking::subarray_sum::subarray_sum</a>(6, array2) ==</div>
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<div class="line"><span class="lineno"> 82</span> 2); <span class="comment">// here we are expecting 2 subsets which sum up to 6 i.e.</span></div>
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<div class="line"><span class="lineno"> 83</span> <span class="comment">// {(1,2,3),(3,3)}</span></div>
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<div class="line"><span class="lineno"> 84</span> std::cout << <span class="stringliteral">"passed"</span> << std::endl;</div>
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@@ -302,7 +301,7 @@ Functions</h2></td></tr>
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<div class="line"><span class="lineno"> 86</span> <span class="comment">// 3rd test</span></div>
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<div class="line"><span class="lineno"> 87</span> std::cout << <span class="stringliteral">"3rd test "</span>;</div>
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<div class="line"><span class="lineno"> 88</span> std::vector<int64_t> array3 = {1, 1, 1, 1};</div>
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<div class="line"><span class="lineno"> 89</span> assert(backtracking::subarray_sum::subarray_sum(1, array3) ==</div>
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<div class="line"><span class="lineno"> 89</span> assert(<a class="code hl_function" href="#af5687bbd9faf927fbd363c71e0baba5e">backtracking::subarray_sum::subarray_sum</a>(1, array3) ==</div>
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<div class="line"><span class="lineno"> 90</span> 4); <span class="comment">// here we are expecting 4 subsets which sum up to 1 i.e.</span></div>
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<div class="line"><span class="lineno"> 91</span> <span class="comment">// {(1),(1),(1),(1)}</span></div>
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<div class="line"><span class="lineno"> 92</span> std::cout << <span class="stringliteral">"passed"</span> << std::endl;</div>
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@@ -310,7 +309,7 @@ Functions</h2></td></tr>
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<div class="line"><span class="lineno"> 94</span> <span class="comment">// 4rd test</span></div>
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<div class="line"><span class="lineno"> 95</span> std::cout << <span class="stringliteral">"4th test "</span>;</div>
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<div class="line"><span class="lineno"> 96</span> std::vector<int64_t> array4 = {3, 3, 3, 3};</div>
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<div class="line"><span class="lineno"> 97</span> assert(backtracking::subarray_sum::subarray_sum(6, array4) ==</div>
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<div class="line"><span class="lineno"> 97</span> assert(<a class="code hl_function" href="#af5687bbd9faf927fbd363c71e0baba5e">backtracking::subarray_sum::subarray_sum</a>(6, array4) ==</div>
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<div class="line"><span class="lineno"> 98</span> 3); <span class="comment">// here we are expecting 3 subsets which sum up to 6 i.e.</span></div>
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<div class="line"><span class="lineno"> 99</span> <span class="comment">// {(3,3),(3,3),(3,3)}</span></div>
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<div class="line"><span class="lineno"> 100</span> std::cout << <span class="stringliteral">"passed"</span> << std::endl;</div>
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@@ -318,11 +317,12 @@ Functions</h2></td></tr>
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<div class="line"><span class="lineno"> 102</span> <span class="comment">// 5th test</span></div>
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<div class="line"><span class="lineno"> 103</span> std::cout << <span class="stringliteral">"5th test "</span>;</div>
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<div class="line"><span class="lineno"> 104</span> std::vector<int64_t> array5 = {};</div>
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<div class="line"><span class="lineno"> 105</span> assert(backtracking::subarray_sum::subarray_sum(6, array5) ==</div>
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<div class="line"><span class="lineno"> 105</span> assert(<a class="code hl_function" href="#af5687bbd9faf927fbd363c71e0baba5e">backtracking::subarray_sum::subarray_sum</a>(6, array5) ==</div>
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<div class="line"><span class="lineno"> 106</span> 0); <span class="comment">// here we are expecting 0 subsets which sum up to 6 i.e. we</span></div>
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<div class="line"><span class="lineno"> 107</span> <span class="comment">// cannot select anything from an empty array</span></div>
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<div class="line"><span class="lineno"> 108</span> std::cout << <span class="stringliteral">"passed"</span> << std::endl;</div>
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<div class="line"><span class="lineno"> 109</span>}</div>
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<div class="ttc" id="asubarray__sum_8cpp_html_af5687bbd9faf927fbd363c71e0baba5e"><div class="ttname"><a href="#af5687bbd9faf927fbd363c71e0baba5e">backtracking::subarray_sum::subarray_sum</a></div><div class="ttdeci">uint64_t subarray_sum(int64_t sum, const std::vector< int64_t > &in_arr)</div><div class="ttdoc">The main function that implements the count of the subarrays.</div><div class="ttdef"><b>Definition</b> <a href="../../df/d94/subarray__sum_8cpp_source.html#l00039">subarray_sum.cpp:39</a></div></div>
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@@ -332,7 +332,7 @@ Functions</h2></td></tr>
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