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realstealthninja
@@ -114,13 +114,14 @@ $(function(){initNavTree('d3/d39/manacher__algorithm_8cpp.html','../../'); initR
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<p>Implementation of <a href="https://en.wikipedia.org/wiki/Longest_palindromic_substring" target="_blank">Manacher's Algorithm</a>
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<a href="#details">More...</a></p>
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<div class="textblock"><code>#include <cassert></code><br />
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<code>#include <cstdint></code><br />
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<code>#include <iostream></code><br />
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<code>#include <vector></code><br />
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<code>#include <cstring></code><br />
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</div><div class="textblock"><div class="dynheader">
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Include dependency graph for manacher_algorithm.cpp:</div>
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<div class="dyncontent">
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<div class="center"><iframe scrolling="no" frameborder="0" src="../../dd/d05/manacher__algorithm_8cpp__incl.svg" width="336" height="111"><p><b>This browser is not able to show SVG: try Firefox, Chrome, Safari, or Opera instead.</b></p></iframe></div>
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</div>
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</div><table class="memberdecls">
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<tr class="heading"><td colspan="2"><h2 class="groupheader"><a id="namespaces" name="namespaces"></a>
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@@ -165,11 +166,11 @@ Functions</h2></td></tr>
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<p>Main function. </p>
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<dl class="section return"><dt>Returns</dt><dd>0 on exit </dd></dl>
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<div class="fragment"><div class="line"><span class="lineno"> 171</span> {</div>
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<div class="line"><span class="lineno"> 172</span> <a class="code hl_function" href="#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
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<div class="line"><span class="lineno"> 173</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><span class="lineno"> 174</span>}</div>
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<div class="ttc" id="amanacher__algorithm_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Self-test implementations.</div><div class="ttdef"><b>Definition</b> manacher_algorithm.cpp:150</div></div>
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<div class="fragment"><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_function" href="#aa8dca7b867074164d5f45b0f3851269d">test</a>(); <span class="comment">// run self-test implementations</span></div>
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<div class="line"><span class="lineno"> 174</span> <span class="keywordflow">return</span> 0;</div>
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<div class="line"><span class="lineno"> 175</span>}</div>
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<div class="ttc" id="amanacher__algorithm_8cpp_html_aa8dca7b867074164d5f45b0f3851269d"><div class="ttname"><a href="#aa8dca7b867074164d5f45b0f3851269d">test</a></div><div class="ttdeci">static void test()</div><div class="ttdoc">Self-test implementations.</div><div class="ttdef"><b>Definition</b> manacher_algorithm.cpp:151</div></div>
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</div><!-- fragment --><div class="dynheader">
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Here is the call graph for this function:</div>
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<div class="dyncontent">
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@@ -201,108 +202,108 @@ 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>the largest palindromic substring </dd></dl>
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<div class="fragment"><div class="line"><span class="lineno"> 40</span> {</div>
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<div class="line"><span class="lineno"> 41</span> <span class="keywordflow">if</span> (prototype.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() > 0) {</div>
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<div class="line"><span class="lineno"> 42</span> <span class="comment">// stuffing characters between the input string to handle cases with</span></div>
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<div class="line"><span class="lineno"> 43</span> <span class="comment">// even length palindrome</span></div>
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<div class="line"><span class="lineno"> 44</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> stuffed_string = <span class="stringliteral">""</span>;</div>
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<div class="line"><span class="lineno"> 45</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> str : prototype) {</div>
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<div class="line"><span class="lineno"> 46</span> stuffed_string += str;</div>
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<div class="line"><span class="lineno"> 47</span> stuffed_string += <span class="stringliteral">"#"</span>;</div>
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<div class="line"><span class="lineno"> 48</span> }</div>
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<div class="line"><span class="lineno"> 49</span> stuffed_string = <span class="stringliteral">"@#"</span> + stuffed_string + <span class="stringliteral">"&"</span>;</div>
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<div class="line"><span class="lineno"> 50</span> </div>
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<div class="line"><span class="lineno"> 51</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<uint64_t></a> palindrome_max_half_length(</div>
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<div class="line"><span class="lineno"> 52</span> stuffed_string.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>(),</div>
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<div class="line"><span class="lineno"> 53</span> 0); <span class="comment">// this array will consist of largest possible half length of</span></div>
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<div class="line"><span class="lineno"> 54</span> <span class="comment">// palindrome centered at index (say i with respect to the</span></div>
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<div class="line"><span class="lineno"> 55</span> <span class="comment">// stuffed string). This value will be lower bound of half</span></div>
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<div class="line"><span class="lineno"> 56</span> <span class="comment">// length since single character is a palindrome in itself.</span></div>
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<div class="line"><span class="lineno"> 57</span> </div>
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<div class="line"><span class="lineno"> 58</span> uint64_t bigger_center =</div>
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<div class="line"><span class="lineno"> 59</span> 0; <span class="comment">// this is the index of the center of palindromic</span></div>
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<div class="line"><span class="lineno"> 60</span> <span class="comment">// substring which would be considered as the larger</span></div>
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<div class="line"><span class="lineno"> 61</span> <span class="comment">// palindrome, having symmetric halves</span></div>
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<div class="line"><span class="lineno"> 62</span> </div>
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<div class="line"><span class="lineno"> 63</span> uint64_t <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/left.html">right</a> = 0; <span class="comment">// this is the maximum length of the palindrome</span></div>
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<div class="line"><span class="lineno"> 64</span> <span class="comment">// from 'bigger_center' to the rightmost end</span></div>
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<div class="line"><span class="lineno"> 65</span> </div>
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<div class="line"><span class="lineno"> 66</span> <span class="comment">// i is considered as center lying within one half of the palindrone</span></div>
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<div class="line"><span class="lineno"> 67</span> <span class="comment">// which is centered at 'bigger_center'</span></div>
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<div class="line"><span class="lineno"> 68</span> <span class="keywordflow">for</span> (uint64_t i = 1; i < stuffed_string.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() - 1; i++) {</div>
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<div class="line"><span class="lineno"> 69</span> <span class="keywordflow">if</span> (i < right) { <span class="comment">// when i is before right end, considering</span></div>
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<div class="line"><span class="lineno"> 70</span> <span class="comment">// 'bigger_center' as center of palindrome</span></div>
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<div class="line"><span class="lineno"> 71</span> uint64_t opposite_to_i =</div>
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<div class="line"><span class="lineno"> 72</span> 2 * bigger_center -</div>
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<div class="line"><span class="lineno"> 73</span> i; <span class="comment">// this is the opposite end of string, if</span></div>
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<div class="line"><span class="lineno"> 74</span> <span class="comment">// centered at center, and having one end as i</span></div>
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<div class="line"><span class="lineno"> 75</span> </div>
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<div class="line"><span class="lineno"> 76</span> <span class="comment">// finding the minimum possible half length among</span></div>
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<div class="line"><span class="lineno"> 77</span> <span class="comment">// the palindrome on having center at opposite end,</span></div>
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<div class="line"><span class="lineno"> 78</span> <span class="comment">// and the string between i and right end,</span></div>
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<div class="line"><span class="lineno"> 79</span> <span class="comment">// considering 'bigger_center' as center of palindrome</span></div>
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<div class="line"><span class="lineno"> 80</span> palindrome_max_half_length[i] = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a>(</div>
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<div class="line"><span class="lineno"> 81</span> palindrome_max_half_length[opposite_to_i], right - i);</div>
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<div class="line"><span class="lineno"> 82</span> }</div>
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<div class="line"><span class="lineno"> 83</span> </div>
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<div class="line"><span class="lineno"> 84</span> <span class="comment">// expanding the palindrome across the maximum stored length in the</span></div>
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<div class="line"><span class="lineno"> 85</span> <span class="comment">// array, centered at i</span></div>
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<div class="line"><span class="lineno"> 86</span> <span class="keywordflow">while</span> (stuffed_string[i + (palindrome_max_half_length[i] + 1)] ==</div>
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<div class="line"><span class="lineno"> 87</span> stuffed_string[i - (palindrome_max_half_length[i] + 1)]) {</div>
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<div class="line"><span class="lineno"> 88</span> palindrome_max_half_length[i]++;</div>
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<div class="line"><span class="lineno"> 89</span> }</div>
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<div class="line"><span class="lineno"> 90</span> </div>
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<div class="line"><span class="lineno"> 91</span> <span class="comment">// if palindrome centered at i exceeds the rightmost end of</span></div>
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<div class="line"><span class="lineno"> 92</span> <span class="comment">// palindrome centered at 'bigger_center', then i will be made the</span></div>
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<div class="line"><span class="lineno"> 93</span> <span class="comment">// 'bigger_center' and right value will also be updated with respect</span></div>
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<div class="line"><span class="lineno"> 94</span> <span class="comment">// to center i</span></div>
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<div class="line"><span class="lineno"> 95</span> <span class="keywordflow">if</span> (i + palindrome_max_half_length[i] > right) {</div>
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<div class="line"><span class="lineno"> 96</span> bigger_center = i;</div>
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<div class="line"><span class="lineno"> 97</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/left.html">right</a> = i + palindrome_max_half_length[i];</div>
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<div class="line"><span class="lineno"> 98</span> }</div>
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<div class="line"><span class="lineno"> 99</span> }</div>
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<div class="line"><span class="lineno"> 100</span> </div>
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<div class="line"><span class="lineno"> 101</span> <span class="comment">// now extracting the first largest palindrome</span></div>
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<div class="line"><span class="lineno"> 102</span> uint64_t half_length = 0; <span class="comment">// half length of the largest palindrome</span></div>
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<div class="line"><span class="lineno"> 103</span> uint64_t center_index = 0; <span class="comment">// index of center of the largest palindrome</span></div>
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<div class="line"><span class="lineno"> 104</span> </div>
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<div class="line"><span class="lineno"> 105</span> <span class="keywordflow">for</span> (uint64_t i = 1; i < stuffed_string.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() - 1; i++) {</div>
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<div class="line"><span class="lineno"> 106</span> <span class="keywordflow">if</span> (palindrome_max_half_length[i] > half_length) {</div>
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<div class="line"><span class="lineno"> 107</span> half_length = palindrome_max_half_length[i];</div>
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<div class="line"><span class="lineno"> 108</span> center_index = i;</div>
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<div class="line"><span class="lineno"> 109</span> }</div>
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<div class="line"><span class="lineno"> 110</span> }</div>
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<div class="line"><span class="lineno"> 111</span> </div>
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<div class="line"><span class="lineno"> 112</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> palindromic_substring =</div>
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<div class="line"><span class="lineno"> 113</span> <span class="stringliteral">""</span>; <span class="comment">// contains the resulting largest palindrome</span></div>
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<div class="line"><span class="lineno"> 114</span> </div>
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<div class="line"><span class="lineno"> 115</span> <span class="keywordflow">if</span> (half_length > 0) {</div>
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<div class="line"><span class="lineno"> 116</span> <span class="comment">// extra information: when '#' is the center, then palindromic</span></div>
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<div class="line"><span class="lineno"> 117</span> <span class="comment">// substring will have even length, else palindromic substring will</span></div>
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<div class="line"><span class="lineno"> 118</span> <span class="comment">// have odd length</span></div>
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<div class="line"><span class="lineno"> 119</span> </div>
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<div class="line"><span class="lineno"> 120</span> uint64_t start =</div>
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<div class="line"><span class="lineno"> 121</span> center_index - half_length +</div>
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<div class="line"><span class="lineno"> 122</span> 1; <span class="comment">// index of first character of palindromic substring</span></div>
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<div class="line"><span class="lineno"> 123</span> uint64_t <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> =</div>
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<div class="line"><span class="lineno"> 124</span> center_index + half_length -</div>
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<div class="line"><span class="lineno"> 125</span> 1; <span class="comment">// index of last character of palindromic substring</span></div>
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<div class="line"><span class="lineno"> 126</span> <span class="keywordflow">for</span> (uint64_t index = start; index <= <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a>; index += 2) {</div>
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<div class="line"><span class="lineno"> 127</span> palindromic_substring += stuffed_string[index];</div>
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<div class="line"><span class="lineno"> 128</span> }</div>
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<div class="line"><span class="lineno"> 129</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><span class="lineno"> 130</span> <span class="comment">// if length = 0, then there does not exist any palindrome of length</span></div>
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<div class="line"><span class="lineno"> 131</span> <span class="comment">// > 1 so we can assign any character of length 1 from string as the</span></div>
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<div class="line"><span class="lineno"> 132</span> <span class="comment">// palindromic substring</span></div>
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<div class="line"><span class="lineno"> 133</span> palindromic_substring = prototype[0];</div>
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<div class="line"><span class="lineno"> 134</span> }</div>
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<div class="line"><span class="lineno"> 135</span> <span class="keywordflow">return</span> palindromic_substring;</div>
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<div class="line"><span class="lineno"> 136</span> </div>
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<div class="line"><span class="lineno"> 137</span> } <span class="keywordflow">else</span> {</div>
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<div class="line"><span class="lineno"> 138</span> <span class="comment">// handling case when string is empty</span></div>
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<div class="line"><span class="lineno"> 139</span> <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div>
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<div class="line"><span class="lineno"> 140</span> }</div>
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<div class="line"><span class="lineno"> 141</span>}</div>
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<div class="fragment"><div class="line"><span class="lineno"> 41</span> {</div>
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<div class="line"><span class="lineno"> 42</span> <span class="keywordflow">if</span> (prototype.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() > 0) {</div>
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<div class="line"><span class="lineno"> 43</span> <span class="comment">// stuffing characters between the input string to handle cases with</span></div>
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<div class="line"><span class="lineno"> 44</span> <span class="comment">// even length palindrome</span></div>
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<div class="line"><span class="lineno"> 45</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> stuffed_string = <span class="stringliteral">""</span>;</div>
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<div class="line"><span class="lineno"> 46</span> <span class="keywordflow">for</span> (<span class="keyword">auto</span> str : prototype) {</div>
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<div class="line"><span class="lineno"> 47</span> stuffed_string += str;</div>
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<div class="line"><span class="lineno"> 48</span> stuffed_string += <span class="stringliteral">"#"</span>;</div>
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<div class="line"><span class="lineno"> 49</span> }</div>
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<div class="line"><span class="lineno"> 50</span> stuffed_string = <span class="stringliteral">"@#"</span> + stuffed_string + <span class="stringliteral">"&"</span>;</div>
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<div class="line"><span class="lineno"> 51</span> </div>
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<div class="line"><span class="lineno"> 52</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/container/vector.html">std::vector<uint64_t></a> palindrome_max_half_length(</div>
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<div class="line"><span class="lineno"> 53</span> stuffed_string.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>(),</div>
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<div class="line"><span class="lineno"> 54</span> 0); <span class="comment">// this array will consist of largest possible half length of</span></div>
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<div class="line"><span class="lineno"> 55</span> <span class="comment">// palindrome centered at index (say i with respect to the</span></div>
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<div class="line"><span class="lineno"> 56</span> <span class="comment">// stuffed string). This value will be lower bound of half</span></div>
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<div class="line"><span class="lineno"> 57</span> <span class="comment">// length since single character is a palindrome in itself.</span></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> uint64_t bigger_center =</div>
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<div class="line"><span class="lineno"> 60</span> 0; <span class="comment">// this is the index of the center of palindromic</span></div>
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<div class="line"><span class="lineno"> 61</span> <span class="comment">// substring which would be considered as the larger</span></div>
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<div class="line"><span class="lineno"> 62</span> <span class="comment">// palindrome, having symmetric halves</span></div>
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<div class="line"><span class="lineno"> 63</span> </div>
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<div class="line"><span class="lineno"> 64</span> uint64_t <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/left.html">right</a> = 0; <span class="comment">// this is the maximum length of the palindrome</span></div>
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<div class="line"><span class="lineno"> 65</span> <span class="comment">// from 'bigger_center' to the rightmost end</span></div>
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<div class="line"><span class="lineno"> 66</span> </div>
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<div class="line"><span class="lineno"> 67</span> <span class="comment">// i is considered as center lying within one half of the palindrone</span></div>
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<div class="line"><span class="lineno"> 68</span> <span class="comment">// which is centered at 'bigger_center'</span></div>
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<div class="line"><span class="lineno"> 69</span> <span class="keywordflow">for</span> (uint64_t i = 1; i < stuffed_string.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() - 1; i++) {</div>
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<div class="line"><span class="lineno"> 70</span> <span class="keywordflow">if</span> (i < right) { <span class="comment">// when i is before right end, considering</span></div>
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<div class="line"><span class="lineno"> 71</span> <span class="comment">// 'bigger_center' as center of palindrome</span></div>
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<div class="line"><span class="lineno"> 72</span> uint64_t opposite_to_i =</div>
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<div class="line"><span class="lineno"> 73</span> 2 * bigger_center -</div>
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<div class="line"><span class="lineno"> 74</span> i; <span class="comment">// this is the opposite end of string, if</span></div>
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<div class="line"><span class="lineno"> 75</span> <span class="comment">// centered at center, and having one end as i</span></div>
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<div class="line"><span class="lineno"> 76</span> </div>
|
||||
<div class="line"><span class="lineno"> 77</span> <span class="comment">// finding the minimum possible half length among</span></div>
|
||||
<div class="line"><span class="lineno"> 78</span> <span class="comment">// the palindrome on having center at opposite end,</span></div>
|
||||
<div class="line"><span class="lineno"> 79</span> <span class="comment">// and the string between i and right end,</span></div>
|
||||
<div class="line"><span class="lineno"> 80</span> <span class="comment">// considering 'bigger_center' as center of palindrome</span></div>
|
||||
<div class="line"><span class="lineno"> 81</span> palindrome_max_half_length[i] = <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/algorithm/min.html">std::min</a>(</div>
|
||||
<div class="line"><span class="lineno"> 82</span> palindrome_max_half_length[opposite_to_i], right - i);</div>
|
||||
<div class="line"><span class="lineno"> 83</span> }</div>
|
||||
<div class="line"><span class="lineno"> 84</span> </div>
|
||||
<div class="line"><span class="lineno"> 85</span> <span class="comment">// expanding the palindrome across the maximum stored length in the</span></div>
|
||||
<div class="line"><span class="lineno"> 86</span> <span class="comment">// array, centered at i</span></div>
|
||||
<div class="line"><span class="lineno"> 87</span> <span class="keywordflow">while</span> (stuffed_string[i + (palindrome_max_half_length[i] + 1)] ==</div>
|
||||
<div class="line"><span class="lineno"> 88</span> stuffed_string[i - (palindrome_max_half_length[i] + 1)]) {</div>
|
||||
<div class="line"><span class="lineno"> 89</span> palindrome_max_half_length[i]++;</div>
|
||||
<div class="line"><span class="lineno"> 90</span> }</div>
|
||||
<div class="line"><span class="lineno"> 91</span> </div>
|
||||
<div class="line"><span class="lineno"> 92</span> <span class="comment">// if palindrome centered at i exceeds the rightmost end of</span></div>
|
||||
<div class="line"><span class="lineno"> 93</span> <span class="comment">// palindrome centered at 'bigger_center', then i will be made the</span></div>
|
||||
<div class="line"><span class="lineno"> 94</span> <span class="comment">// 'bigger_center' and right value will also be updated with respect</span></div>
|
||||
<div class="line"><span class="lineno"> 95</span> <span class="comment">// to center i</span></div>
|
||||
<div class="line"><span class="lineno"> 96</span> <span class="keywordflow">if</span> (i + palindrome_max_half_length[i] > right) {</div>
|
||||
<div class="line"><span class="lineno"> 97</span> bigger_center = i;</div>
|
||||
<div class="line"><span class="lineno"> 98</span> <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/left.html">right</a> = i + palindrome_max_half_length[i];</div>
|
||||
<div class="line"><span class="lineno"> 99</span> }</div>
|
||||
<div class="line"><span class="lineno"> 100</span> }</div>
|
||||
<div class="line"><span class="lineno"> 101</span> </div>
|
||||
<div class="line"><span class="lineno"> 102</span> <span class="comment">// now extracting the first largest palindrome</span></div>
|
||||
<div class="line"><span class="lineno"> 103</span> uint64_t half_length = 0; <span class="comment">// half length of the largest palindrome</span></div>
|
||||
<div class="line"><span class="lineno"> 104</span> uint64_t center_index = 0; <span class="comment">// index of center of the largest palindrome</span></div>
|
||||
<div class="line"><span class="lineno"> 105</span> </div>
|
||||
<div class="line"><span class="lineno"> 106</span> <span class="keywordflow">for</span> (uint64_t i = 1; i < stuffed_string.<a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string/size.html">size</a>() - 1; i++) {</div>
|
||||
<div class="line"><span class="lineno"> 107</span> <span class="keywordflow">if</span> (palindrome_max_half_length[i] > half_length) {</div>
|
||||
<div class="line"><span class="lineno"> 108</span> half_length = palindrome_max_half_length[i];</div>
|
||||
<div class="line"><span class="lineno"> 109</span> center_index = i;</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> </div>
|
||||
<div class="line"><span class="lineno"> 113</span> <a class="code hl_classRef" target="_blank" href="http://en.cppreference.com/w/cpp/string/basic_string.html">std::string</a> palindromic_substring =</div>
|
||||
<div class="line"><span class="lineno"> 114</span> <span class="stringliteral">""</span>; <span class="comment">// contains the resulting largest palindrome</span></div>
|
||||
<div class="line"><span class="lineno"> 115</span> </div>
|
||||
<div class="line"><span class="lineno"> 116</span> <span class="keywordflow">if</span> (half_length > 0) {</div>
|
||||
<div class="line"><span class="lineno"> 117</span> <span class="comment">// extra information: when '#' is the center, then palindromic</span></div>
|
||||
<div class="line"><span class="lineno"> 118</span> <span class="comment">// substring will have even length, else palindromic substring will</span></div>
|
||||
<div class="line"><span class="lineno"> 119</span> <span class="comment">// have odd length</span></div>
|
||||
<div class="line"><span class="lineno"> 120</span> </div>
|
||||
<div class="line"><span class="lineno"> 121</span> uint64_t start =</div>
|
||||
<div class="line"><span class="lineno"> 122</span> center_index - half_length +</div>
|
||||
<div class="line"><span class="lineno"> 123</span> 1; <span class="comment">// index of first character of palindromic substring</span></div>
|
||||
<div class="line"><span class="lineno"> 124</span> uint64_t <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a> =</div>
|
||||
<div class="line"><span class="lineno"> 125</span> center_index + half_length -</div>
|
||||
<div class="line"><span class="lineno"> 126</span> 1; <span class="comment">// index of last character of palindromic substring</span></div>
|
||||
<div class="line"><span class="lineno"> 127</span> <span class="keywordflow">for</span> (uint64_t index = start; index <= <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/iterator/end.html">end</a>; index += 2) {</div>
|
||||
<div class="line"><span class="lineno"> 128</span> palindromic_substring += stuffed_string[index];</div>
|
||||
<div class="line"><span class="lineno"> 129</span> }</div>
|
||||
<div class="line"><span class="lineno"> 130</span> } <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><span class="lineno"> 131</span> <span class="comment">// if length = 0, then there does not exist any palindrome of length</span></div>
|
||||
<div class="line"><span class="lineno"> 132</span> <span class="comment">// > 1 so we can assign any character of length 1 from string as the</span></div>
|
||||
<div class="line"><span class="lineno"> 133</span> <span class="comment">// palindromic substring</span></div>
|
||||
<div class="line"><span class="lineno"> 134</span> palindromic_substring = prototype[0];</div>
|
||||
<div class="line"><span class="lineno"> 135</span> }</div>
|
||||
<div class="line"><span class="lineno"> 136</span> <span class="keywordflow">return</span> palindromic_substring;</div>
|
||||
<div class="line"><span class="lineno"> 137</span> </div>
|
||||
<div class="line"><span class="lineno"> 138</span> } <span class="keywordflow">else</span> {</div>
|
||||
<div class="line"><span class="lineno"> 139</span> <span class="comment">// handling case when string is empty</span></div>
|
||||
<div class="line"><span class="lineno"> 140</span> <span class="keywordflow">return</span> <span class="stringliteral">""</span>;</div>
|
||||
<div class="line"><span class="lineno"> 141</span> }</div>
|
||||
<div class="line"><span class="lineno"> 142</span>}</div>
|
||||
<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>
|
||||
<div class="ttc" id="aend_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/iterator/end.html">std::end</a></div><div class="ttdeci">T end(T... args)</div></div>
|
||||
<div class="ttc" id="aleft_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/manip/left.html">std::right</a></div><div class="ttdeci">T right(T... args)</div></div>
|
||||
@@ -342,22 +343,22 @@ Here is the call graph for this function:</div>
|
||||
|
||||
<p>Self-test implementations. </p>
|
||||
<dl class="section return"><dt>Returns</dt><dd>void </dd></dl>
|
||||
<div class="fragment"><div class="line"><span class="lineno"> 150</span> {</div>
|
||||
<div class="line"><span class="lineno"> 151</span> assert(strings::manacher::manacher(<span class="stringliteral">""</span>) == <span class="stringliteral">""</span>);</div>
|
||||
<div class="line"><span class="lineno"> 152</span> assert(strings::manacher::manacher(<span class="stringliteral">"abababc"</span>) == <span class="stringliteral">"ababa"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 153</span> assert(strings::manacher::manacher(<span class="stringliteral">"cbaabd"</span>) == <span class="stringliteral">"baab"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 154</span> assert(strings::manacher::manacher(<span class="stringliteral">"DedzefDeD"</span>) == <span class="stringliteral">"DeD"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 155</span> assert(strings::manacher::manacher(<span class="stringliteral">"XZYYXXYZXX"</span>) == <span class="stringliteral">"YXXY"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 156</span> assert(strings::manacher::manacher(<span class="stringliteral">"1sm222m10abc"</span>) == <span class="stringliteral">"m222m"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 157</span> assert(strings::manacher::manacher(<span class="stringliteral">"798989591"</span>) == <span class="stringliteral">"98989"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 158</span> assert(strings::manacher::manacher(<span class="stringliteral">"xacdedcax"</span>) == <span class="stringliteral">"xacdedcax"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 159</span> assert(strings::manacher::manacher(<span class="stringliteral">"xaccax"</span>) == <span class="stringliteral">"xaccax"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 160</span> assert(strings::manacher::manacher(<span class="stringliteral">"a"</span>) == <span class="stringliteral">"a"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 161</span> assert(strings::manacher::manacher(<span class="stringliteral">"xy"</span>) == <span class="stringliteral">"x"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 162</span> assert(strings::manacher::manacher(<span class="stringliteral">"abced"</span>) == <span class="stringliteral">"a"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 163</span> </div>
|
||||
<div class="line"><span class="lineno"> 164</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 have passed!"</span> << <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
|
||||
<div class="line"><span class="lineno"> 165</span>}</div>
|
||||
<div class="fragment"><div class="line"><span class="lineno"> 151</span> {</div>
|
||||
<div class="line"><span class="lineno"> 152</span> assert(strings::manacher::manacher(<span class="stringliteral">""</span>) == <span class="stringliteral">""</span>);</div>
|
||||
<div class="line"><span class="lineno"> 153</span> assert(strings::manacher::manacher(<span class="stringliteral">"abababc"</span>) == <span class="stringliteral">"ababa"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 154</span> assert(strings::manacher::manacher(<span class="stringliteral">"cbaabd"</span>) == <span class="stringliteral">"baab"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 155</span> assert(strings::manacher::manacher(<span class="stringliteral">"DedzefDeD"</span>) == <span class="stringliteral">"DeD"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 156</span> assert(strings::manacher::manacher(<span class="stringliteral">"XZYYXXYZXX"</span>) == <span class="stringliteral">"YXXY"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 157</span> assert(strings::manacher::manacher(<span class="stringliteral">"1sm222m10abc"</span>) == <span class="stringliteral">"m222m"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 158</span> assert(strings::manacher::manacher(<span class="stringliteral">"798989591"</span>) == <span class="stringliteral">"98989"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 159</span> assert(strings::manacher::manacher(<span class="stringliteral">"xacdedcax"</span>) == <span class="stringliteral">"xacdedcax"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 160</span> assert(strings::manacher::manacher(<span class="stringliteral">"xaccax"</span>) == <span class="stringliteral">"xaccax"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 161</span> assert(strings::manacher::manacher(<span class="stringliteral">"a"</span>) == <span class="stringliteral">"a"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 162</span> assert(strings::manacher::manacher(<span class="stringliteral">"xy"</span>) == <span class="stringliteral">"x"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 163</span> assert(strings::manacher::manacher(<span class="stringliteral">"abced"</span>) == <span class="stringliteral">"a"</span>);</div>
|
||||
<div class="line"><span class="lineno"> 164</span> </div>
|
||||
<div class="line"><span class="lineno"> 165</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 have passed!"</span> << <a class="code hl_functionRef" target="_blank" href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a>;</div>
|
||||
<div class="line"><span class="lineno"> 166</span>}</div>
|
||||
<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>
|
||||
<div class="ttc" id="aendl_html"><div class="ttname"><a href="http://en.cppreference.com/w/cpp/io/manip/endl.html">std::endl</a></div><div class="ttdeci">T endl(T... args)</div></div>
|
||||
</div><!-- fragment --><div class="dynheader">
|
||||
|
||||
Reference in New Issue
Block a user