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<div class="headertitle"><div class="title">nqueen_print_all_solutions.cpp</div></div>
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</div><!--header-->
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<div class="contents">
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<a href="../../d7/d24/nqueen__print__all__solutions_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="l00010" name="l00010"></a><span class="lineno"> 10</span><span class="preprocessor">#include <array></span> </div>
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<div class="line"><a id="l00011" name="l00011"></a><span class="lineno"> 11</span><span class="preprocessor">#include <iostream></span> </div>
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<div class="line"><a id="l00012" name="l00012"></a><span class="lineno"> 12</span></div>
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<div class="line"><a id="l00017" name="l00017"></a><span class="lineno"> 17</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../db/dc0/namespacebacktracking.html">backtracking</a> {</div>
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<div class="line"><a id="l00024" name="l00024"></a><span class="lineno"> 24</span><span class="keyword">namespace </span><a class="code hl_namespace" href="../../df/d44/namespacen__queens__all__solutions.html">n_queens_all_solutions</a> {</div>
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<div class="line"><a id="l00030" name="l00030"></a><span class="lineno"> 30</span><span class="keyword">template</span> <<span class="keywordtype">size_t</span> n></div>
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<div class="foldopen" id="foldopen00031" data-start="{" data-end="}">
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<div class="line"><a id="l00031" name="l00031"></a><span class="lineno"><a class="line" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aebd5e11fab6dab282efccfb61beb0bd9"> 31</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aebd5e11fab6dab282efccfb61beb0bd9">PrintSol</a>(<span class="keyword">const</span> std::array<std::array<int, n>, n>& board) {</div>
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<div class="line"><a id="l00032" name="l00032"></a><span class="lineno"> 32</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n; i++) {</div>
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<div class="line"><a id="l00033" name="l00033"></a><span class="lineno"> 33</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> j = 0; j < n; j++) {</div>
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<div class="line"><a id="l00034" name="l00034"></a><span class="lineno"> 34</span> std::cout << board[i][j] << <span class="stringliteral">" "</span>;</div>
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<div class="line"><a id="l00035" name="l00035"></a><span class="lineno"> 35</span> }</div>
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<div class="line"><a id="l00036" name="l00036"></a><span class="lineno"> 36</span> std::cout << std::endl;</div>
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<div class="line"><a id="l00037" name="l00037"></a><span class="lineno"> 37</span> }</div>
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<div class="line"><a id="l00038" name="l00038"></a><span class="lineno"> 38</span> std::cout << std::endl;</div>
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<div class="line"><a id="l00039" name="l00039"></a><span class="lineno"> 39</span>}</div>
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</div>
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<div class="line"><a id="l00040" name="l00040"></a><span class="lineno"> 40</span></div>
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<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span><span class="keyword">template</span> <<span class="keywordtype">size_t</span> n></div>
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<div class="foldopen" id="foldopen00051" data-start="{" data-end="}">
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<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"><a class="line" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aea343d8a72a39c9a4c0fbcbc362f2648"> 51</a></span><span class="keywordtype">bool</span> <a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aea343d8a72a39c9a4c0fbcbc362f2648">CanIMove</a>(<span class="keyword">const</span> std::array<std::array<int, n>, n>& board, <span class="keywordtype">int</span> row,</div>
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<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordtype">int</span> col) {</div>
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<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < col; i++) {</div>
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<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> <span class="keywordflow">if</span> (board[row][i] == 1) {</div>
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<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> }</div>
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<div class="line"><a id="l00058" name="l00058"></a><span class="lineno"> 58</span> }</div>
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<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = row, j = col; i >= 0 && j >= 0; i--, j--) {</div>
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<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">if</span> (board[i][j] == 1) {</div>
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<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
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<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> }</div>
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<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = row, j = col; i <= n - 1 && j >= 0; i++, j--) {</div>
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<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> <span class="keywordflow">if</span> (board[i][j] == 1) {</div>
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<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</span> <span class="keywordflow">return</span> <span class="keyword">false</span>;</div>
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<div class="line"><a id="l00069" name="l00069"></a><span class="lineno"> 69</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 class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="keywordflow">return</span> <span class="keyword">true</span>;</div>
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<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span>}</div>
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</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="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span><span class="keyword">template</span> <<span class="keywordtype">size_t</span> n></div>
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<div class="foldopen" id="foldopen00081" data-start="{" data-end="}">
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<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"><a class="line" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#acc809c055f335011de0d9030034c7108"> 81</a></span><span class="keywordtype">void</span> <a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#acc809c055f335011de0d9030034c7108">NQueenSol</a>(std::array<std::array<int, n>, n> board, <span class="keywordtype">int</span> col) {</div>
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<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> <span class="keywordflow">if</span> (col >= n) {</div>
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<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> <a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aebd5e11fab6dab282efccfb61beb0bd9">PrintSol</a>(board);</div>
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<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> <span class="keywordflow">return</span>;</div>
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<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> }</div>
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<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="keywordflow">for</span> (<span class="keywordtype">int</span> i = 0; i < n; i++) {</div>
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<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">if</span> (<a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aea343d8a72a39c9a4c0fbcbc362f2648">CanIMove</a>(board, i, col)) {</div>
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<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> board[i][col] = 1;</div>
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<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> <a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#acc809c055f335011de0d9030034c7108">NQueenSol</a>(board, col + 1);</div>
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<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> board[i][col] = 0;</div>
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<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> }</div>
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<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> }</div>
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<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span>}</div>
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</div>
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<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span>} <span class="comment">// namespace n_queens_all_solutions</span></div>
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<div class="line"><a id="l00095" name="l00095"></a><span class="lineno"> 95</span>} <span class="comment">// namespace backtracking</span></div>
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<div class="line"><a id="l00096" name="l00096"></a><span class="lineno"> 96</span></div>
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<div class="foldopen" id="foldopen00101" data-start="{" data-end="}">
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<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"><a class="line" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4"> 101</a></span><span class="keywordtype">int</span> <a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#ae66f6b31b5ad750f1fe042a706a4e3d4">main</a>() {</div>
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<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> <span class="keyword">const</span> <span class="keywordtype">int</span> n = 4;</div>
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<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> std::array<std::array<int, n>, n> board{0};</div>
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<div class="line"><a id="l00104" name="l00104"></a><span class="lineno"> 104</span> </div>
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<div class="line"><a id="l00105" name="l00105"></a><span class="lineno"> 105</span> <a class="code hl_function" href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#acc809c055f335011de0d9030034c7108">backtracking::n_queens_all_solutions::NQueenSol</a>(board, 0);</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="ttc" id="anamespacebacktracking_html"><div class="ttname"><a href="../../db/dc0/namespacebacktracking.html">backtracking</a></div><div class="ttdoc">for vector container</div></div>
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<div class="ttc" id="anamespacen__queens__all__solutions_html"><div class="ttname"><a href="../../df/d44/namespacen__queens__all__solutions.html">n_queens_all_solutions</a></div><div class="ttdoc">Functions for the Eight Queens puzzle with all solutions.</div></div>
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<div class="ttc" id="anqueen__print__all__solutions_8cpp_html_acc809c055f335011de0d9030034c7108"><div class="ttname"><a href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#acc809c055f335011de0d9030034c7108">backtracking::n_queens_all_solutions::NQueenSol</a></div><div class="ttdeci">void NQueenSol(std::array< std::array< int, n >, n > board, int col)</div><div class="ttdoc">Main function to solve the N Queens problem.</div><div class="ttdef"><b>Definition</b> <a href="#l00081">nqueen_print_all_solutions.cpp:81</a></div></div>
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<div class="ttc" id="anqueen__print__all__solutions_8cpp_html_ae66f6b31b5ad750f1fe042a706a4e3d4"><div class="ttname"><a href="../../d7/d24/nqueen__print__all__solutions_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="#l00101">nqueen_print_all_solutions.cpp:101</a></div></div>
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<div class="ttc" id="anqueen__print__all__solutions_8cpp_html_aea343d8a72a39c9a4c0fbcbc362f2648"><div class="ttname"><a href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aea343d8a72a39c9a4c0fbcbc362f2648">backtracking::n_queens_all_solutions::CanIMove</a></div><div class="ttdeci">bool CanIMove(const std::array< std::array< int, n >, n > &board, int row, int col)</div><div class="ttdoc">Check if a queen can be placed on the matrix.</div><div class="ttdef"><b>Definition</b> <a href="#l00051">nqueen_print_all_solutions.cpp:51</a></div></div>
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<div class="ttc" id="anqueen__print__all__solutions_8cpp_html_aebd5e11fab6dab282efccfb61beb0bd9"><div class="ttname"><a href="../../d7/d24/nqueen__print__all__solutions_8cpp.html#aebd5e11fab6dab282efccfb61beb0bd9">backtracking::n_queens_all_solutions::PrintSol</a></div><div class="ttdeci">void PrintSol(const std::array< std::array< int, n >, n > &board)</div><div class="ttdoc">Utility function to print matrix.</div><div class="ttdef"><b>Definition</b> <a href="#l00031">nqueen_print_all_solutions.cpp:31</a></div></div>
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