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<title>Algorithms_in_C++: dynamic_programming/shortest_common_supersequence.cpp File Reference</title>
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<div id="projectname">Algorithms_in_C++<span id="projectnumber"> 1.0.0</span>
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</div>
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<div id="projectbrief">Set of algorithms implemented in C++.</div>
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/* @license magnet:?xt=urn:btih:d3d9a9a6595521f9666a5e94cc830dab83b65699&dn=expat.txt MIT */
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@@ -153,22 +153,22 @@ related <a class="el" href="../../d3/d06/ode__semi__implicit__euler_8cpp.html#ab
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||||
</table>
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||||
</div><div class="memdoc">
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||||
<p >Main function (driver code) </p>
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||||
<div class="fragment"><div class="line"><a id="l00164" name="l00164"></a><span class="lineno"> 164</span> {</div>
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<div class="line"><a id="l00165" name="l00165"></a><span class="lineno"> 165</span> <span class="comment">// test for implementation</span></div>
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||||
<div class="line"><a id="l00166" name="l00166"></a><span class="lineno"> 166</span> <a class="code hl_function" href="../../d7/d65/shortest__common__supersequence_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>();</div>
|
||||
<div class="line"><a id="l00167" name="l00167"></a><span class="lineno"> 167</span> </div>
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||||
<div class="line"><a id="l00168" name="l00168"></a><span class="lineno"> 168</span> <span class="comment">// user input</span></div>
|
||||
<div class="line"><a id="l00169" name="l00169"></a><span class="lineno"> 169</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> s1, s2;</div>
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<div class="line"><a id="l00170" name="l00170"></a><span class="lineno"> 170</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> >> s1;</div>
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<div class="line"><a id="l00171" name="l00171"></a><span class="lineno"> 171</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> >> s2;</div>
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<div class="line"><a id="l00172" name="l00172"></a><span class="lineno"> 172</span> </div>
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<div class="line"><a id="l00173" name="l00173"></a><span class="lineno"> 173</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <a class="code hl_function" href="../../d7/d35/matrix__exponentiation_8cpp.html#ad8389ed58fd0ec66df248014775ad1fa">ans</a>;</div>
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<div class="line"><a id="l00174" name="l00174"></a><span class="lineno"> 174</span> </div>
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<div class="line"><a id="l00175" name="l00175"></a><span class="lineno"> 175</span> <span class="comment">// user output</span></div>
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||||
<div class="line"><a id="l00176" name="l00176"></a><span class="lineno"> 176</span> <a class="code hl_function" href="../../d7/d35/matrix__exponentiation_8cpp.html#ad8389ed58fd0ec66df248014775ad1fa">ans</a> = <a class="code hl_function" href="../../d7/d65/shortest__common__supersequence_8cpp.html#ad2ee8d7e67da9f6eb85146b08dad95e6">dynamic_programming::shortest_common_supersequence::scs</a>(s1, s2);</div>
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||||
<div class="line"><a id="l00177" name="l00177"></a><span class="lineno"> 177</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <a class="code hl_function" href="../../d7/d35/matrix__exponentiation_8cpp.html#ad8389ed58fd0ec66df248014775ad1fa">ans</a>;</div>
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<div class="line"><a id="l00178" name="l00178"></a><span class="lineno"> 178</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><a id="l00179" name="l00179"></a><span class="lineno"> 179</span>}</div>
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<div class="fragment"><div class="line"><span class="lineno"> 164</span> {</div>
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<div class="line"><span class="lineno"> 165</span> <span class="comment">// test for implementation</span></div>
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<div class="line"><span class="lineno"> 166</span> <a class="code hl_function" href="../../d7/d65/shortest__common__supersequence_8cpp.html#aa8dca7b867074164d5f45b0f3851269d">test</a>();</div>
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<div class="line"><span class="lineno"> 167</span> </div>
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<div class="line"><span class="lineno"> 168</span> <span class="comment">// user input</span></div>
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<div class="line"><span class="lineno"> 169</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> s1, s2;</div>
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||||
<div class="line"><span class="lineno"> 170</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> >> s1;</div>
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||||
<div class="line"><span class="lineno"> 171</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a> >> s2;</div>
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<div class="line"><span class="lineno"> 172</span> </div>
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<div class="line"><span class="lineno"> 173</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> <a class="code hl_function" href="../../d7/d35/matrix__exponentiation_8cpp.html#ad8389ed58fd0ec66df248014775ad1fa">ans</a>;</div>
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<div class="line"><span class="lineno"> 174</span> </div>
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<div class="line"><span class="lineno"> 175</span> <span class="comment">// user output</span></div>
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||||
<div class="line"><span class="lineno"> 176</span> <a class="code hl_function" href="../../d7/d35/matrix__exponentiation_8cpp.html#ad8389ed58fd0ec66df248014775ad1fa">ans</a> = <a class="code hl_function" href="../../d7/d65/shortest__common__supersequence_8cpp.html#ad2ee8d7e67da9f6eb85146b08dad95e6">dynamic_programming::shortest_common_supersequence::scs</a>(s1, s2);</div>
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||||
<div class="line"><span class="lineno"> 177</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <a class="code hl_function" href="../../d7/d35/matrix__exponentiation_8cpp.html#ad8389ed58fd0ec66df248014775ad1fa">ans</a>;</div>
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<div class="line"><span class="lineno"> 178</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><span class="lineno"> 179</span>}</div>
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<div class="ttc" id="abasic_istream_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/basic_istream.html">std::cin</a></div></div>
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<div class="ttc" id="abasic_ostream_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a></div></div>
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<div class="ttc" id="abasic_string_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a></div></div>
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@@ -217,81 +217,81 @@ Here is the call graph for this function:</div>
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</dd>
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</dl>
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<dl class="section return"><dt>Returns</dt><dd>string 'Z', superSequence of X and Y </dd></dl>
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<div class="fragment"><div class="line"><a id="l00042" name="l00042"></a><span class="lineno"> 42</span> {</div>
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||||
<div class="line"><a id="l00043" name="l00043"></a><span class="lineno"> 43</span> </div>
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<div class="line"><a id="l00044" name="l00044"></a><span class="lineno"> 44</span> <span class="comment">// Edge cases</span></div>
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<div class="line"><a id="l00045" name="l00045"></a><span class="lineno"> 45</span> <span class="comment">// If either str1 or str2 or both are empty</span></div>
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<div class="line"><a id="l00046" name="l00046"></a><span class="lineno"> 46</span> <span class="keywordflow">if</span>(str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>() && str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>()) {</div>
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||||
<div class="line"><a id="l00047" name="l00047"></a><span class="lineno"> 47</span> <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div>
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||||
<div class="line"><a id="l00048" name="l00048"></a><span class="lineno"> 48</span> }</div>
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||||
<div class="line"><a id="l00049" name="l00049"></a><span class="lineno"> 49</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>()) {</div>
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||||
<div class="line"><a id="l00050" name="l00050"></a><span class="lineno"> 50</span> <span class="keywordflow">return</span> str2;</div>
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||||
<div class="line"><a id="l00051" name="l00051"></a><span class="lineno"> 51</span> }</div>
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||||
<div class="line"><a id="l00052" name="l00052"></a><span class="lineno"> 52</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>()) {</div>
|
||||
<div class="line"><a id="l00053" name="l00053"></a><span class="lineno"> 53</span> <span class="keywordflow">return</span> str1;</div>
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||||
<div class="line"><a id="l00054" name="l00054"></a><span class="lineno"> 54</span> }</div>
|
||||
<div class="line"><a id="l00055" name="l00055"></a><span class="lineno"> 55</span> </div>
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||||
<div class="line"><a id="l00056" name="l00056"></a><span class="lineno"> 56</span> <span class="comment">// creating lookup table</span></div>
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||||
<div class="line"><a id="l00057" name="l00057"></a><span class="lineno"> 57</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::vector <int></a>> lookup(str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>() + 1, <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <int></a> (str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>() + 1, 0));</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="l00059" name="l00059"></a><span class="lineno"> 59</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=1; i <= str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>(); i++) {</div>
|
||||
<div class="line"><a id="l00060" name="l00060"></a><span class="lineno"> 60</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j=1; j <= str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>(); j++) {</div>
|
||||
<div class="line"><a id="l00061" name="l00061"></a><span class="lineno"> 61</span> <span class="keywordflow">if</span>(str1[i-1] == str2[j-1]) {</div>
|
||||
<div class="line"><a id="l00062" name="l00062"></a><span class="lineno"> 62</span> lookup[i][j] = lookup[i-1][j-1] + 1;</div>
|
||||
<div class="line"><a id="l00063" name="l00063"></a><span class="lineno"> 63</span> }</div>
|
||||
<div class="line"><a id="l00064" name="l00064"></a><span class="lineno"> 64</span> <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><a id="l00065" name="l00065"></a><span class="lineno"> 65</span> lookup[i][j] = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/max.html">std::max</a>(lookup[i-1][j], lookup[i][j-1]);</div>
|
||||
<div class="line"><a id="l00066" name="l00066"></a><span class="lineno"> 66</span> }</div>
|
||||
<div class="line"><a id="l00067" name="l00067"></a><span class="lineno"> 67</span> }</div>
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||||
<div class="line"><a id="l00068" name="l00068"></a><span class="lineno"> 68</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> <span class="comment">// making supersequence</span></div>
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||||
<div class="line"><a id="l00071" name="l00071"></a><span class="lineno"> 71</span> <span class="comment">// i and j are initially pointed towards end of strings</span></div>
|
||||
<div class="line"><a id="l00072" name="l00072"></a><span class="lineno"> 72</span> <span class="comment">// Super-sequence will be constructed backwards</span></div>
|
||||
<div class="line"><a id="l00073" name="l00073"></a><span class="lineno"> 73</span> <span class="keywordtype">int</span> i=str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>();</div>
|
||||
<div class="line"><a id="l00074" name="l00074"></a><span class="lineno"> 74</span> <span class="keywordtype">int</span> j=str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>();</div>
|
||||
<div class="line"><a id="l00075" name="l00075"></a><span class="lineno"> 75</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> s;</div>
|
||||
<div class="line"><a id="l00076" name="l00076"></a><span class="lineno"> 76</span> </div>
|
||||
<div class="line"><a id="l00077" name="l00077"></a><span class="lineno"> 77</span> <span class="keywordflow">while</span>(i>0 && j>0) {</div>
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||||
<div class="line"><a id="l00078" name="l00078"></a><span class="lineno"> 78</span> </div>
|
||||
<div class="line"><a id="l00079" name="l00079"></a><span class="lineno"> 79</span> <span class="comment">// If the characters at i and j of both strings are same</span></div>
|
||||
<div class="line"><a id="l00080" name="l00080"></a><span class="lineno"> 80</span> <span class="comment">// We only need to add them once in s</span></div>
|
||||
<div class="line"><a id="l00081" name="l00081"></a><span class="lineno"> 81</span> <span class="keywordflow">if</span>(str1[i-1] == str2[j-1]) {</div>
|
||||
<div class="line"><a id="l00082" name="l00082"></a><span class="lineno"> 82</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str1[i-1]);</div>
|
||||
<div class="line"><a id="l00083" name="l00083"></a><span class="lineno"> 83</span> i--;</div>
|
||||
<div class="line"><a id="l00084" name="l00084"></a><span class="lineno"> 84</span> j--;</div>
|
||||
<div class="line"><a id="l00085" name="l00085"></a><span class="lineno"> 85</span> }</div>
|
||||
<div class="line"><a id="l00086" name="l00086"></a><span class="lineno"> 86</span> <span class="comment">// otherwise we check lookup table for recurrences of characters</span></div>
|
||||
<div class="line"><a id="l00087" name="l00087"></a><span class="lineno"> 87</span> <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><a id="l00088" name="l00088"></a><span class="lineno"> 88</span> <span class="keywordflow">if</span>(lookup[i-1][j] > lookup[i][j-1]) {</div>
|
||||
<div class="line"><a id="l00089" name="l00089"></a><span class="lineno"> 89</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str1[i-1]);</div>
|
||||
<div class="line"><a id="l00090" name="l00090"></a><span class="lineno"> 90</span> i--;</div>
|
||||
<div class="line"><a id="l00091" name="l00091"></a><span class="lineno"> 91</span> }</div>
|
||||
<div class="line"><a id="l00092" name="l00092"></a><span class="lineno"> 92</span> <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><a id="l00093" name="l00093"></a><span class="lineno"> 93</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str2[j-1]);</div>
|
||||
<div class="line"><a id="l00094" name="l00094"></a><span class="lineno"> 94</span> j--;</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> }</div>
|
||||
<div class="line"><a id="l00097" name="l00097"></a><span class="lineno"> 97</span> }</div>
|
||||
<div class="line"><a id="l00098" name="l00098"></a><span class="lineno"> 98</span> </div>
|
||||
<div class="line"><a id="l00099" name="l00099"></a><span class="lineno"> 99</span> <span class="comment">// copying remaining elements</span></div>
|
||||
<div class="line"><a id="l00100" name="l00100"></a><span class="lineno"> 100</span> <span class="comment">// if j becomes 0 before i</span></div>
|
||||
<div class="line"><a id="l00101" name="l00101"></a><span class="lineno"> 101</span> <span class="keywordflow">while</span>(i > 0) {</div>
|
||||
<div class="line"><a id="l00102" name="l00102"></a><span class="lineno"> 102</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str1[i-1]);</div>
|
||||
<div class="line"><a id="l00103" name="l00103"></a><span class="lineno"> 103</span> i--;</div>
|
||||
<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> </div>
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<div class="line"><a id="l00106" name="l00106"></a><span class="lineno"> 106</span> <span class="comment">// if i becomes 0 before j</span></div>
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<div class="line"><a id="l00107" name="l00107"></a><span class="lineno"> 107</span> <span class="keywordflow">while</span>(j > 0) {</div>
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<div class="line"><a id="l00108" name="l00108"></a><span class="lineno"> 108</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str2[j-1]);</div>
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<div class="line"><a id="l00109" name="l00109"></a><span class="lineno"> 109</span> j--;</div>
|
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<div class="line"><a id="l00110" name="l00110"></a><span class="lineno"> 110</span> }</div>
|
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<div class="line"><a id="l00111" name="l00111"></a><span class="lineno"> 111</span> </div>
|
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<div class="line"><a id="l00112" name="l00112"></a><span class="lineno"> 112</span> <span class="comment">// As the super sequence is constructd backwards</span></div>
|
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<div class="line"><a id="l00113" name="l00113"></a><span class="lineno"> 113</span> <span class="comment">// reversing the string before returning gives us the correct output </span></div>
|
||||
<div class="line"><a id="l00114" name="l00114"></a><span class="lineno"> 114</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/reverse.html">reverse</a>(s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/begin.html">begin</a>(), s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/end.html">end</a>());</div>
|
||||
<div class="line"><a id="l00115" name="l00115"></a><span class="lineno"> 115</span> <span class="keywordflow">return</span> s;</div>
|
||||
<div class="line"><a id="l00116" name="l00116"></a><span class="lineno"> 116</span> }</div>
|
||||
<div class="fragment"><div class="line"><span class="lineno"> 42</span> {</div>
|
||||
<div class="line"><span class="lineno"> 43</span> </div>
|
||||
<div class="line"><span class="lineno"> 44</span> <span class="comment">// Edge cases</span></div>
|
||||
<div class="line"><span class="lineno"> 45</span> <span class="comment">// If either str1 or str2 or both are empty</span></div>
|
||||
<div class="line"><span class="lineno"> 46</span> <span class="keywordflow">if</span>(str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>() && str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>()) {</div>
|
||||
<div class="line"><span class="lineno"> 47</span> <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div>
|
||||
<div class="line"><span class="lineno"> 48</span> }</div>
|
||||
<div class="line"><span class="lineno"> 49</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>()) {</div>
|
||||
<div class="line"><span class="lineno"> 50</span> <span class="keywordflow">return</span> str2;</div>
|
||||
<div class="line"><span class="lineno"> 51</span> }</div>
|
||||
<div class="line"><span class="lineno"> 52</span> <span class="keywordflow">else</span> <span class="keywordflow">if</span>(str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">empty</a>()) {</div>
|
||||
<div class="line"><span class="lineno"> 53</span> <span class="keywordflow">return</span> str1;</div>
|
||||
<div class="line"><span class="lineno"> 54</span> }</div>
|
||||
<div class="line"><span class="lineno"> 55</span> </div>
|
||||
<div class="line"><span class="lineno"> 56</span> <span class="comment">// creating lookup table</span></div>
|
||||
<div class="line"><span class="lineno"> 57</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::vector <int></a>> lookup(str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>() + 1, <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <int></a> (str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>() + 1, 0));</div>
|
||||
<div class="line"><span class="lineno"> 58</span> </div>
|
||||
<div class="line"><span class="lineno"> 59</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=1; i <= str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>(); i++) {</div>
|
||||
<div class="line"><span class="lineno"> 60</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> j=1; j <= str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>(); j++) {</div>
|
||||
<div class="line"><span class="lineno"> 61</span> <span class="keywordflow">if</span>(str1[i-1] == str2[j-1]) {</div>
|
||||
<div class="line"><span class="lineno"> 62</span> lookup[i][j] = lookup[i-1][j-1] + 1;</div>
|
||||
<div class="line"><span class="lineno"> 63</span> }</div>
|
||||
<div class="line"><span class="lineno"> 64</span> <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><span class="lineno"> 65</span> lookup[i][j] = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/max.html">std::max</a>(lookup[i-1][j], lookup[i][j-1]);</div>
|
||||
<div class="line"><span class="lineno"> 66</span> }</div>
|
||||
<div class="line"><span class="lineno"> 67</span> }</div>
|
||||
<div class="line"><span class="lineno"> 68</span> }</div>
|
||||
<div class="line"><span class="lineno"> 69</span> </div>
|
||||
<div class="line"><span class="lineno"> 70</span> <span class="comment">// making supersequence</span></div>
|
||||
<div class="line"><span class="lineno"> 71</span> <span class="comment">// i and j are initially pointed towards end of strings</span></div>
|
||||
<div class="line"><span class="lineno"> 72</span> <span class="comment">// Super-sequence will be constructed backwards</span></div>
|
||||
<div class="line"><span class="lineno"> 73</span> <span class="keywordtype">int</span> i=str1.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>();</div>
|
||||
<div class="line"><span class="lineno"> 74</span> <span class="keywordtype">int</span> j=str2.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">length</a>();</div>
|
||||
<div class="line"><span class="lineno"> 75</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> s;</div>
|
||||
<div class="line"><span class="lineno"> 76</span> </div>
|
||||
<div class="line"><span class="lineno"> 77</span> <span class="keywordflow">while</span>(i>0 && j>0) {</div>
|
||||
<div class="line"><span class="lineno"> 78</span> </div>
|
||||
<div class="line"><span class="lineno"> 79</span> <span class="comment">// If the characters at i and j of both strings are same</span></div>
|
||||
<div class="line"><span class="lineno"> 80</span> <span class="comment">// We only need to add them once in s</span></div>
|
||||
<div class="line"><span class="lineno"> 81</span> <span class="keywordflow">if</span>(str1[i-1] == str2[j-1]) {</div>
|
||||
<div class="line"><span class="lineno"> 82</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str1[i-1]);</div>
|
||||
<div class="line"><span class="lineno"> 83</span> i--;</div>
|
||||
<div class="line"><span class="lineno"> 84</span> j--;</div>
|
||||
<div class="line"><span class="lineno"> 85</span> }</div>
|
||||
<div class="line"><span class="lineno"> 86</span> <span class="comment">// otherwise we check lookup table for recurrences of characters</span></div>
|
||||
<div class="line"><span class="lineno"> 87</span> <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><span class="lineno"> 88</span> <span class="keywordflow">if</span>(lookup[i-1][j] > lookup[i][j-1]) {</div>
|
||||
<div class="line"><span class="lineno"> 89</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str1[i-1]);</div>
|
||||
<div class="line"><span class="lineno"> 90</span> i--;</div>
|
||||
<div class="line"><span class="lineno"> 91</span> }</div>
|
||||
<div class="line"><span class="lineno"> 92</span> <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><span class="lineno"> 93</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str2[j-1]);</div>
|
||||
<div class="line"><span class="lineno"> 94</span> j--;</div>
|
||||
<div class="line"><span class="lineno"> 95</span> }</div>
|
||||
<div class="line"><span class="lineno"> 96</span> }</div>
|
||||
<div class="line"><span class="lineno"> 97</span> }</div>
|
||||
<div class="line"><span class="lineno"> 98</span> </div>
|
||||
<div class="line"><span class="lineno"> 99</span> <span class="comment">// copying remaining elements</span></div>
|
||||
<div class="line"><span class="lineno"> 100</span> <span class="comment">// if j becomes 0 before i</span></div>
|
||||
<div class="line"><span class="lineno"> 101</span> <span class="keywordflow">while</span>(i > 0) {</div>
|
||||
<div class="line"><span class="lineno"> 102</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str1[i-1]);</div>
|
||||
<div class="line"><span class="lineno"> 103</span> i--;</div>
|
||||
<div class="line"><span class="lineno"> 104</span> }</div>
|
||||
<div class="line"><span class="lineno"> 105</span> </div>
|
||||
<div class="line"><span class="lineno"> 106</span> <span class="comment">// if i becomes 0 before j</span></div>
|
||||
<div class="line"><span class="lineno"> 107</span> <span class="keywordflow">while</span>(j > 0) {</div>
|
||||
<div class="line"><span class="lineno"> 108</span> s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/push_back.html">push_back</a>(str2[j-1]);</div>
|
||||
<div class="line"><span class="lineno"> 109</span> j--;</div>
|
||||
<div class="line"><span class="lineno"> 110</span> }</div>
|
||||
<div class="line"><span class="lineno"> 111</span> </div>
|
||||
<div class="line"><span class="lineno"> 112</span> <span class="comment">// As the super sequence is constructd backwards</span></div>
|
||||
<div class="line"><span class="lineno"> 113</span> <span class="comment">// reversing the string before returning gives us the correct output </span></div>
|
||||
<div class="line"><span class="lineno"> 114</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/reverse.html">reverse</a>(s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/begin.html">begin</a>(), s.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/end.html">end</a>());</div>
|
||||
<div class="line"><span class="lineno"> 115</span> <span class="keywordflow">return</span> s;</div>
|
||||
<div class="line"><span class="lineno"> 116</span> }</div>
|
||||
<div class="ttc" id="abegin_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/begin.html">std::string::begin</a></div><div class="ttdeci">T begin(T... args)</div></div>
|
||||
<div class="ttc" id="aempty_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/empty.html">std::string::empty</a></div><div class="ttdeci">T empty(T... args)</div></div>
|
||||
<div class="ttc" id="aend_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/string/basic_string/end.html">std::string::end</a></div><div class="ttdeci">T end(T... args)</div></div>
|
||||
@@ -332,44 +332,44 @@ Here is the call graph for this function:</div>
|
||||
</table>
|
||||
</div><div class="memdoc">
|
||||
<p >Test Function </p><dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
|
||||
<div class="fragment"><div class="line"><a id="l00124" name="l00124"></a><span class="lineno"> 124</span> {</div>
|
||||
<div class="line"><a id="l00125" name="l00125"></a><span class="lineno"> 125</span> <span class="comment">// custom input vector</span></div>
|
||||
<div class="line"><a id="l00126" name="l00126"></a><span class="lineno"> 126</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::vector <std::string></a>> scsStrings {</div>
|
||||
<div class="line"><a id="l00127" name="l00127"></a><span class="lineno"> 127</span> {<span class="stringliteral">"ABCXYZ"</span>, <span class="stringliteral">"ABZ"</span>},</div>
|
||||
<div class="line"><a id="l00128" name="l00128"></a><span class="lineno"> 128</span> {<span class="stringliteral">"ABZ"</span>, <span class="stringliteral">"ABCXYZ"</span>},</div>
|
||||
<div class="line"><a id="l00129" name="l00129"></a><span class="lineno"> 129</span> {<span class="stringliteral">"AGGTAB"</span>, <span class="stringliteral">"GXTXAYB"</span>},</div>
|
||||
<div class="line"><a id="l00130" name="l00130"></a><span class="lineno"> 130</span> {<span class="stringliteral">"X"</span>, <span class="stringliteral">"Y"</span>},</div>
|
||||
<div class="line"><a id="l00131" name="l00131"></a><span class="lineno"> 131</span> };</div>
|
||||
<div class="line"><a id="l00132" name="l00132"></a><span class="lineno"> 132</span> </div>
|
||||
<div class="line"><a id="l00133" name="l00133"></a><span class="lineno"> 133</span> <span class="comment">// calculated output vector by scs function</span></div>
|
||||
<div class="line"><a id="l00134" name="l00134"></a><span class="lineno"> 134</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::string></a> calculatedOutput(4, <span class="stringliteral">""</span>);</div>
|
||||
<div class="line"><a id="l00135" name="l00135"></a><span class="lineno"> 135</span> <span class="keywordtype">int</span> i=0;</div>
|
||||
<div class="line"><a id="l00136" name="l00136"></a><span class="lineno"> 136</span> <span class="keywordflow">for</span>(<span class="keyword">auto</span> & scsString : scsStrings) {</div>
|
||||
<div class="line"><a id="l00137" name="l00137"></a><span class="lineno"> 137</span> </div>
|
||||
<div class="line"><a id="l00138" name="l00138"></a><span class="lineno"> 138</span> calculatedOutput[i] = <a class="code hl_function" href="../../d7/d65/shortest__common__supersequence_8cpp.html#ad2ee8d7e67da9f6eb85146b08dad95e6">dynamic_programming::shortest_common_supersequence::scs</a>(</div>
|
||||
<div class="line"><a id="l00139" name="l00139"></a><span class="lineno"> 139</span> scsString[0], scsString[1]</div>
|
||||
<div class="line"><a id="l00140" name="l00140"></a><span class="lineno"> 140</span> );</div>
|
||||
<div class="line"><a id="l00141" name="l00141"></a><span class="lineno"> 141</span> 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> </div>
|
||||
<div class="line"><a id="l00144" name="l00144"></a><span class="lineno"> 144</span> <span class="comment">// expected output vector acc to problem statement</span></div>
|
||||
<div class="line"><a id="l00145" name="l00145"></a><span class="lineno"> 145</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::string></a> expectedOutput {</div>
|
||||
<div class="line"><a id="l00146" name="l00146"></a><span class="lineno"> 146</span> <span class="stringliteral">"ABCXYZ"</span>,</div>
|
||||
<div class="line"><a id="l00147" name="l00147"></a><span class="lineno"> 147</span> <span class="stringliteral">"ABCXYZ"</span>,</div>
|
||||
<div class="line"><a id="l00148" name="l00148"></a><span class="lineno"> 148</span> <span class="stringliteral">"AGGXTXAYB"</span>,</div>
|
||||
<div class="line"><a id="l00149" name="l00149"></a><span class="lineno"> 149</span> <span class="stringliteral">"XY"</span></div>
|
||||
<div class="line"><a id="l00150" name="l00150"></a><span class="lineno"> 150</span> };</div>
|
||||
<div class="line"><a id="l00151" name="l00151"></a><span class="lineno"> 151</span> </div>
|
||||
<div class="line"><a id="l00152" name="l00152"></a><span class="lineno"> 152</span> <span class="comment">// Testing implementation via assert function</span></div>
|
||||
<div class="line"><a id="l00153" name="l00153"></a><span class="lineno"> 153</span> <span class="comment">// It will throw error if any of the expected test fails</span></div>
|
||||
<div class="line"><a id="l00154" name="l00154"></a><span class="lineno"> 154</span> <span class="comment">// Else it will give nothing</span></div>
|
||||
<div class="line"><a id="l00155" name="l00155"></a><span class="lineno"> 155</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i < scsStrings.size(); i++) {</div>
|
||||
<div class="line"><a id="l00156" name="l00156"></a><span class="lineno"> 156</span> assert(expectedOutput[i] == calculatedOutput[i]);</div>
|
||||
<div class="line"><a id="l00157" name="l00157"></a><span class="lineno"> 157</span> }</div>
|
||||
<div class="line"><a id="l00158" name="l00158"></a><span class="lineno"> 158</span> </div>
|
||||
<div class="line"><a id="l00159" name="l00159"></a><span class="lineno"> 159</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"All tests passed successfully!\n"</span>;</div>
|
||||
<div class="line"><a id="l00160" name="l00160"></a><span class="lineno"> 160</span> <span class="keywordflow">return</span>;</div>
|
||||
<div class="line"><a id="l00161" name="l00161"></a><span class="lineno"> 161</span>}</div>
|
||||
<div class="fragment"><div class="line"><span class="lineno"> 124</span> {</div>
|
||||
<div class="line"><span class="lineno"> 125</span> <span class="comment">// custom input vector</span></div>
|
||||
<div class="line"><span class="lineno"> 126</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::vector <std::string></a>> scsStrings {</div>
|
||||
<div class="line"><span class="lineno"> 127</span> {<span class="stringliteral">"ABCXYZ"</span>, <span class="stringliteral">"ABZ"</span>},</div>
|
||||
<div class="line"><span class="lineno"> 128</span> {<span class="stringliteral">"ABZ"</span>, <span class="stringliteral">"ABCXYZ"</span>},</div>
|
||||
<div class="line"><span class="lineno"> 129</span> {<span class="stringliteral">"AGGTAB"</span>, <span class="stringliteral">"GXTXAYB"</span>},</div>
|
||||
<div class="line"><span class="lineno"> 130</span> {<span class="stringliteral">"X"</span>, <span class="stringliteral">"Y"</span>},</div>
|
||||
<div class="line"><span class="lineno"> 131</span> };</div>
|
||||
<div class="line"><span class="lineno"> 132</span> </div>
|
||||
<div class="line"><span class="lineno"> 133</span> <span class="comment">// calculated output vector by scs function</span></div>
|
||||
<div class="line"><span class="lineno"> 134</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::string></a> calculatedOutput(4, <span class="stringliteral">""</span>);</div>
|
||||
<div class="line"><span class="lineno"> 135</span> <span class="keywordtype">int</span> i=0;</div>
|
||||
<div class="line"><span class="lineno"> 136</span> <span class="keywordflow">for</span>(<span class="keyword">auto</span> & scsString : scsStrings) {</div>
|
||||
<div class="line"><span class="lineno"> 137</span> </div>
|
||||
<div class="line"><span class="lineno"> 138</span> calculatedOutput[i] = <a class="code hl_function" href="../../d7/d65/shortest__common__supersequence_8cpp.html#ad2ee8d7e67da9f6eb85146b08dad95e6">dynamic_programming::shortest_common_supersequence::scs</a>(</div>
|
||||
<div class="line"><span class="lineno"> 139</span> scsString[0], scsString[1]</div>
|
||||
<div class="line"><span class="lineno"> 140</span> );</div>
|
||||
<div class="line"><span class="lineno"> 141</span> i++;</div>
|
||||
<div class="line"><span class="lineno"> 142</span> }</div>
|
||||
<div class="line"><span class="lineno"> 143</span> </div>
|
||||
<div class="line"><span class="lineno"> 144</span> <span class="comment">// expected output vector acc to problem statement</span></div>
|
||||
<div class="line"><span class="lineno"> 145</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector <std::string></a> expectedOutput {</div>
|
||||
<div class="line"><span class="lineno"> 146</span> <span class="stringliteral">"ABCXYZ"</span>,</div>
|
||||
<div class="line"><span class="lineno"> 147</span> <span class="stringliteral">"ABCXYZ"</span>,</div>
|
||||
<div class="line"><span class="lineno"> 148</span> <span class="stringliteral">"AGGXTXAYB"</span>,</div>
|
||||
<div class="line"><span class="lineno"> 149</span> <span class="stringliteral">"XY"</span></div>
|
||||
<div class="line"><span class="lineno"> 150</span> };</div>
|
||||
<div class="line"><span class="lineno"> 151</span> </div>
|
||||
<div class="line"><span class="lineno"> 152</span> <span class="comment">// Testing implementation via assert function</span></div>
|
||||
<div class="line"><span class="lineno"> 153</span> <span class="comment">// It will throw error if any of the expected test fails</span></div>
|
||||
<div class="line"><span class="lineno"> 154</span> <span class="comment">// Else it will give nothing</span></div>
|
||||
<div class="line"><span class="lineno"> 155</span> <span class="keywordflow">for</span>(<span class="keywordtype">int</span> i=0; i < scsStrings.size(); i++) {</div>
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||||
<div class="line"><span class="lineno"> 156</span> assert(expectedOutput[i] == calculatedOutput[i]);</div>
|
||||
<div class="line"><span class="lineno"> 157</span> }</div>
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||||
<div class="line"><span class="lineno"> 158</span> </div>
|
||||
<div class="line"><span class="lineno"> 159</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/basic_ostream.html">std::cout</a> << <span class="stringliteral">"All tests passed successfully!\n"</span>;</div>
|
||||
<div class="line"><span class="lineno"> 160</span> <span class="keywordflow">return</span>;</div>
|
||||
<div class="line"><span class="lineno"> 161</span>}</div>
|
||||
</div><!-- fragment -->
|
||||
</div>
|
||||
</div>
|
||||
@@ -379,7 +379,7 @@ Here is the call graph for this function:</div>
|
||||
<div id="nav-path" class="navpath"><!-- id is needed for treeview function! -->
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||||
<ul>
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<li class="navelem"><a class="el" href="../../dir_8a20dd5bfd5341a725342bf72b6b686f.html">dynamic_programming</a></li><li class="navelem"><a class="el" href="../../d7/d65/shortest__common__supersequence_8cpp.html">shortest_common_supersequence.cpp</a></li>
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<li class="footer">Generated by <a href="https://www.doxygen.org/index.html"><img class="footer" src="../../doxygen.svg" width="104" height="31" alt="doxygen"/></a> 1.9.2 </li>
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Block a user