yetao
/
hello-algo
mirror of https://github.com/krahets/hello-algo.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity

deploy

Browse Source
gh-pages
krahets 2 years ago
parent 59a5f15c95
commit f3ccaa3008
4 changed files with 145 additions and 69 deletions
Show Stats Download Patch File Download Diff File

102
chapter_backtracking/backtracking_algorithm/index.html
Unescape View File

@ -1861,7 +1861,18 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><span class="filename">preorder_find_nodes.cpp</span><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">preOrder</span><span class="p">}</span>
<div class="highlight"><span class="filename">preorder_find_nodes.cpp</span><pre><span></span><code><a id="__codelineno-1-1" name="__codelineno-1-1" href="#__codelineno-1-1"></a><span class="cm">/* 前序遍历 */</span>
<a id="__codelineno-1-2" name="__codelineno-1-2" href="#__codelineno-1-2"></a><span class="kt">void</span><span class="w"> </span><span class="nf">preOrder</span><span class="p">(</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*</span><span class="n">root</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-1-3" name="__codelineno-1-3" href="#__codelineno-1-3"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">root</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="k">nullptr</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-1-4" name="__codelineno-1-4" href="#__codelineno-1-4"></a><span class="w"> </span><span class="k">return</span><span class="p">;</span>
<a id="__codelineno-1-5" name="__codelineno-1-5" href="#__codelineno-1-5"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-1-6" name="__codelineno-1-6" href="#__codelineno-1-6"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">val</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">7</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-1-7" name="__codelineno-1-7" href="#__codelineno-1-7"></a><span class="w"> </span><span class="c1">// 记录解</span>
<a id="__codelineno-1-8" name="__codelineno-1-8" href="#__codelineno-1-8"></a><span class="w"> </span><span class="n">res</span><span class="p">.</span><span class="n">push_back</span><span class="p">(</span><span class="n">root</span><span class="p">);</span>
<a id="__codelineno-1-9" name="__codelineno-1-9" href="#__codelineno-1-9"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-1-10" name="__codelineno-1-10" href="#__codelineno-1-10"></a><span class="w"> </span><span class="n">preOrder</span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">left</span><span class="p">);</span>
<a id="__codelineno-1-11" name="__codelineno-1-11" href="#__codelineno-1-11"></a><span class="w"> </span><span class="n">preOrder</span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">right</span><span class="p">);</span>
<a id="__codelineno-1-12" name="__codelineno-1-12" href="#__codelineno-1-12"></a><span class="p">}</span>
</code></pre></div>
</div>
<div class="tabbed-block">
@ -1939,7 +1950,22 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><span class="filename">preorder_find_paths.cpp</span><pre><span></span><code><a id="__codelineno-11-1" name="__codelineno-11-1" href="#__codelineno-11-1"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">preOrder</span><span class="p">}</span>
<div class="highlight"><span class="filename">preorder_find_paths.cpp</span><pre><span></span><code><a id="__codelineno-11-1" name="__codelineno-11-1" href="#__codelineno-11-1"></a><span class="cm">/* 前序遍历 */</span>
<a id="__codelineno-11-2" name="__codelineno-11-2" href="#__codelineno-11-2"></a><span class="kt">void</span><span class="w"> </span><span class="nf">preOrder</span><span class="p">(</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*</span><span class="n">root</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-11-3" name="__codelineno-11-3" href="#__codelineno-11-3"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">root</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="k">nullptr</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-11-4" name="__codelineno-11-4" href="#__codelineno-11-4"></a><span class="w"> </span><span class="k">return</span><span class="p">;</span>
<a id="__codelineno-11-5" name="__codelineno-11-5" href="#__codelineno-11-5"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-11-6" name="__codelineno-11-6" href="#__codelineno-11-6"></a><span class="w"> </span><span class="c1">// 尝试</span>
<a id="__codelineno-11-7" name="__codelineno-11-7" href="#__codelineno-11-7"></a><span class="w"> </span><span class="n">path</span><span class="p">.</span><span class="n">push_back</span><span class="p">(</span><span class="n">root</span><span class="p">);</span>
<a id="__codelineno-11-8" name="__codelineno-11-8" href="#__codelineno-11-8"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">val</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">7</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-11-9" name="__codelineno-11-9" href="#__codelineno-11-9"></a><span class="w"> </span><span class="c1">// 记录解</span>
<a id="__codelineno-11-10" name="__codelineno-11-10" href="#__codelineno-11-10"></a><span class="w"> </span><span class="n">res</span><span class="p">.</span><span class="n">push_back</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<a id="__codelineno-11-11" name="__codelineno-11-11" href="#__codelineno-11-11"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-11-12" name="__codelineno-11-12" href="#__codelineno-11-12"></a><span class="w"> </span><span class="n">preOrder</span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">left</span><span class="p">);</span>
<a id="__codelineno-11-13" name="__codelineno-11-13" href="#__codelineno-11-13"></a><span class="w"> </span><span class="n">preOrder</span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">right</span><span class="p">);</span>
<a id="__codelineno-11-14" name="__codelineno-11-14" href="#__codelineno-11-14"></a><span class="w"> </span><span class="c1">// 回退</span>
<a id="__codelineno-11-15" name="__codelineno-11-15" href="#__codelineno-11-15"></a><span class="w"> </span><span class="n">path</span><span class="p">.</span><span class="n">pop_back</span><span class="p">();</span>
<a id="__codelineno-11-16" name="__codelineno-11-16" href="#__codelineno-11-16"></a><span class="p">}</span>
</code></pre></div>
</div>
<div class="tabbed-block">
@ -2055,7 +2081,22 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><span class="filename">preorder_find_constrained_paths.cpp</span><pre><span></span><code><a id="__codelineno-21-1" name="__codelineno-21-1" href="#__codelineno-21-1"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">preOrder</span><span class="p">}</span>
<div class="highlight"><span class="filename">preorder_find_constrained_paths.cpp</span><pre><span></span><code><a id="__codelineno-21-1" name="__codelineno-21-1" href="#__codelineno-21-1"></a><span class="cm">/* 前序遍历 */</span>
<a id="__codelineno-21-2" name="__codelineno-21-2" href="#__codelineno-21-2"></a><span class="kt">void</span><span class="w"> </span><span class="nf">preOrder</span><span class="p">(</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*</span><span class="n">root</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-21-3" name="__codelineno-21-3" href="#__codelineno-21-3"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">root</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="k">nullptr</span><span class="w"> </span><span class="o">||</span><span class="w"> </span><span class="n">root</span><span class="o">-&gt;</span><span class="n">val</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">3</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-21-4" name="__codelineno-21-4" href="#__codelineno-21-4"></a><span class="w"> </span><span class="k">return</span><span class="p">;</span>
<a id="__codelineno-21-5" name="__codelineno-21-5" href="#__codelineno-21-5"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-21-6" name="__codelineno-21-6" href="#__codelineno-21-6"></a><span class="w"> </span><span class="c1">// 尝试</span>
<a id="__codelineno-21-7" name="__codelineno-21-7" href="#__codelineno-21-7"></a><span class="w"> </span><span class="n">path</span><span class="p">.</span><span class="n">push_back</span><span class="p">(</span><span class="n">root</span><span class="p">);</span>
<a id="__codelineno-21-8" name="__codelineno-21-8" href="#__codelineno-21-8"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">val</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">7</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-21-9" name="__codelineno-21-9" href="#__codelineno-21-9"></a><span class="w"> </span><span class="c1">// 记录解</span>
<a id="__codelineno-21-10" name="__codelineno-21-10" href="#__codelineno-21-10"></a><span class="w"> </span><span class="n">res</span><span class="p">.</span><span class="n">push_back</span><span class="p">(</span><span class="n">path</span><span class="p">);</span>
<a id="__codelineno-21-11" name="__codelineno-21-11" href="#__codelineno-21-11"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-21-12" name="__codelineno-21-12" href="#__codelineno-21-12"></a><span class="w"> </span><span class="n">preOrder</span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">left</span><span class="p">);</span>
<a id="__codelineno-21-13" name="__codelineno-21-13" href="#__codelineno-21-13"></a><span class="w"> </span><span class="n">preOrder</span><span class="p">(</span><span class="n">root</span><span class="o">-&gt;</span><span class="n">right</span><span class="p">);</span>
<a id="__codelineno-21-14" name="__codelineno-21-14" href="#__codelineno-21-14"></a><span class="w"> </span><span class="c1">// 回退</span>
<a id="__codelineno-21-15" name="__codelineno-21-15" href="#__codelineno-21-15"></a><span class="w"> </span><span class="n">path</span><span class="p">.</span><span class="n">pop_back</span><span class="p">();</span>
<a id="__codelineno-21-16" name="__codelineno-21-16" href="#__codelineno-21-16"></a><span class="p">}</span>
</code></pre></div>
</div>
<div class="tabbed-block">
@ -2228,17 +2269,52 @@
</code></pre></div>
</div>
<div class="tabbed-block">
<div class="highlight"><span class="filename">backtrack_find_constrained_paths.cpp</span><pre><span></span><code><a id="__codelineno-32-1" name="__codelineno-32-1" href="#__codelineno-32-1"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">isSolution</span><span class="p">}</span>
<a id="__codelineno-32-2" name="__codelineno-32-2" href="#__codelineno-32-2"></a>
<a id="__codelineno-32-3" name="__codelineno-32-3" href="#__codelineno-32-3"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">recordSolution</span><span class="p">}</span>
<a id="__codelineno-32-4" name="__codelineno-32-4" href="#__codelineno-32-4"></a>
<a id="__codelineno-32-5" name="__codelineno-32-5" href="#__codelineno-32-5"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">isValid</span><span class="p">}</span>
<a id="__codelineno-32-6" name="__codelineno-32-6" href="#__codelineno-32-6"></a>
<a id="__codelineno-32-7" name="__codelineno-32-7" href="#__codelineno-32-7"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">makeChoice</span><span class="p">}</span>
<a id="__codelineno-32-8" name="__codelineno-32-8" href="#__codelineno-32-8"></a>
<a id="__codelineno-32-9" name="__codelineno-32-9" href="#__codelineno-32-9"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">undoChoice</span><span class="p">}</span>
<div class="highlight"><span class="filename">backtrack_find_constrained_paths.cpp</span><pre><span></span><code><a id="__codelineno-32-1" name="__codelineno-32-1" href="#__codelineno-32-1"></a><span class="cm">/* 判断当前状态是否为解 */</span>
<a id="__codelineno-32-2" name="__codelineno-32-2" href="#__codelineno-32-2"></a><span class="kt">bool</span><span class="w"> </span><span class="nf">isSolution</span><span class="p">(</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">state</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-3" name="__codelineno-32-3" href="#__codelineno-32-3"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="o">!</span><span class="n">state</span><span class="p">.</span><span class="n">empty</span><span class="p">()</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">state</span><span class="p">.</span><span class="n">back</span><span class="p">()</span><span class="o">-&gt;</span><span class="n">val</span><span class="w"> </span><span class="o">==</span><span class="w"> </span><span class="mi">7</span><span class="p">;</span>
<a id="__codelineno-32-4" name="__codelineno-32-4" href="#__codelineno-32-4"></a><span class="p">}</span>
<a id="__codelineno-32-5" name="__codelineno-32-5" href="#__codelineno-32-5"></a>
<a id="__codelineno-32-6" name="__codelineno-32-6" href="#__codelineno-32-6"></a><span class="cm">/* 记录解 */</span>
<a id="__codelineno-32-7" name="__codelineno-32-7" href="#__codelineno-32-7"></a><span class="kt">void</span><span class="w"> </span><span class="nf">recordSolution</span><span class="p">(</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">vector</span><span class="o">&lt;</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">res</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-8" name="__codelineno-32-8" href="#__codelineno-32-8"></a><span class="w"> </span><span class="n">res</span><span class="p">.</span><span class="n">push_back</span><span class="p">(</span><span class="n">state</span><span class="p">);</span>
<a id="__codelineno-32-9" name="__codelineno-32-9" href="#__codelineno-32-9"></a><span class="p">}</span>
<a id="__codelineno-32-10" name="__codelineno-32-10" href="#__codelineno-32-10"></a>
<a id="__codelineno-32-11" name="__codelineno-32-11" href="#__codelineno-32-11"></a><span class="p">[</span><span class="k">class</span><span class="p">]{}</span><span class="o">-</span><span class="p">[</span><span class="n">func</span><span class="p">]{</span><span class="n">backtrack</span><span class="p">}</span>
<a id="__codelineno-32-11" name="__codelineno-32-11" href="#__codelineno-32-11"></a><span class="cm">/* 判断在当前状态下，该选择是否合法 */</span>
<a id="__codelineno-32-12" name="__codelineno-32-12" href="#__codelineno-32-12"></a><span class="kt">bool</span><span class="w"> </span><span class="nf">isValid</span><span class="p">(</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*</span><span class="n">choice</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-13" name="__codelineno-32-13" href="#__codelineno-32-13"></a><span class="w"> </span><span class="k">return</span><span class="w"> </span><span class="n">choice</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="k">nullptr</span><span class="w"> </span><span class="o">&amp;&amp;</span><span class="w"> </span><span class="n">choice</span><span class="o">-&gt;</span><span class="n">val</span><span class="w"> </span><span class="o">!=</span><span class="w"> </span><span class="mi">3</span><span class="p">;</span>
<a id="__codelineno-32-14" name="__codelineno-32-14" href="#__codelineno-32-14"></a><span class="p">}</span>
<a id="__codelineno-32-15" name="__codelineno-32-15" href="#__codelineno-32-15"></a>
<a id="__codelineno-32-16" name="__codelineno-32-16" href="#__codelineno-32-16"></a><span class="cm">/* 更新状态 */</span>
<a id="__codelineno-32-17" name="__codelineno-32-17" href="#__codelineno-32-17"></a><span class="kt">void</span><span class="w"> </span><span class="nf">makeChoice</span><span class="p">(</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*</span><span class="n">choice</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-18" name="__codelineno-32-18" href="#__codelineno-32-18"></a><span class="w"> </span><span class="n">state</span><span class="p">.</span><span class="n">push_back</span><span class="p">(</span><span class="n">choice</span><span class="p">);</span>
<a id="__codelineno-32-19" name="__codelineno-32-19" href="#__codelineno-32-19"></a><span class="p">}</span>
<a id="__codelineno-32-20" name="__codelineno-32-20" href="#__codelineno-32-20"></a>
<a id="__codelineno-32-21" name="__codelineno-32-21" href="#__codelineno-32-21"></a><span class="cm">/* 恢复状态 */</span>
<a id="__codelineno-32-22" name="__codelineno-32-22" href="#__codelineno-32-22"></a><span class="kt">void</span><span class="w"> </span><span class="nf">undoChoice</span><span class="p">(</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*</span><span class="n">choice</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-23" name="__codelineno-32-23" href="#__codelineno-32-23"></a><span class="w"> </span><span class="n">state</span><span class="p">.</span><span class="n">pop_back</span><span class="p">();</span>
<a id="__codelineno-32-24" name="__codelineno-32-24" href="#__codelineno-32-24"></a><span class="p">}</span>
<a id="__codelineno-32-25" name="__codelineno-32-25" href="#__codelineno-32-25"></a>
<a id="__codelineno-32-26" name="__codelineno-32-26" href="#__codelineno-32-26"></a><span class="cm">/* 回溯算法 */</span>
<a id="__codelineno-32-27" name="__codelineno-32-27" href="#__codelineno-32-27"></a><span class="kt">void</span><span class="w"> </span><span class="nf">backtrack</span><span class="p">(</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">choices</span><span class="p">,</span><span class="w"> </span><span class="n">vector</span><span class="o">&lt;</span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;&gt;</span><span class="w"> </span><span class="o">&amp;</span><span class="n">res</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-28" name="__codelineno-32-28" href="#__codelineno-32-28"></a><span class="w"> </span><span class="c1">// 检查是否为解</span>
<a id="__codelineno-32-29" name="__codelineno-32-29" href="#__codelineno-32-29"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">isSolution</span><span class="p">(</span><span class="n">state</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-30" name="__codelineno-32-30" href="#__codelineno-32-30"></a><span class="w"> </span><span class="c1">// 记录解</span>
<a id="__codelineno-32-31" name="__codelineno-32-31" href="#__codelineno-32-31"></a><span class="w"> </span><span class="n">recordSolution</span><span class="p">(</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">res</span><span class="p">);</span>
<a id="__codelineno-32-32" name="__codelineno-32-32" href="#__codelineno-32-32"></a><span class="w"> </span><span class="k">return</span><span class="p">;</span>
<a id="__codelineno-32-33" name="__codelineno-32-33" href="#__codelineno-32-33"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-32-34" name="__codelineno-32-34" href="#__codelineno-32-34"></a><span class="w"> </span><span class="c1">// 遍历所有选择</span>
<a id="__codelineno-32-35" name="__codelineno-32-35" href="#__codelineno-32-35"></a><span class="w"> </span><span class="k">for</span><span class="w"> </span><span class="p">(</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*</span><span class="n">choice</span><span class="w"> </span><span class="o">:</span><span class="w"> </span><span class="n">choices</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-36" name="__codelineno-32-36" href="#__codelineno-32-36"></a><span class="w"> </span><span class="c1">// 剪枝：检查选择是否合法</span>
<a id="__codelineno-32-37" name="__codelineno-32-37" href="#__codelineno-32-37"></a><span class="w"> </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="n">isValid</span><span class="p">(</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">choice</span><span class="p">))</span><span class="w"> </span><span class="p">{</span>
<a id="__codelineno-32-38" name="__codelineno-32-38" href="#__codelineno-32-38"></a><span class="w"> </span><span class="c1">// 尝试：做出选择，更新状态</span>
<a id="__codelineno-32-39" name="__codelineno-32-39" href="#__codelineno-32-39"></a><span class="w"> </span><span class="n">makeChoice</span><span class="p">(</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">choice</span><span class="p">);</span>
<a id="__codelineno-32-40" name="__codelineno-32-40" href="#__codelineno-32-40"></a><span class="w"> </span><span class="n">vector</span><span class="o">&lt;</span><span class="n">TreeNode</span><span class="w"> </span><span class="o">*&gt;</span><span class="w"> </span><span class="n">nextChoices</span><span class="p">{</span><span class="n">choice</span><span class="o">-&gt;</span><span class="n">left</span><span class="p">,</span><span class="w"> </span><span class="n">choice</span><span class="o">-&gt;</span><span class="n">right</span><span class="p">};</span>
<a id="__codelineno-32-41" name="__codelineno-32-41" href="#__codelineno-32-41"></a><span class="w"> </span><span class="n">backtrack</span><span class="p">(</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">nextChoices</span><span class="p">,</span><span class="w"> </span><span class="n">res</span><span class="p">);</span>
<a id="__codelineno-32-42" name="__codelineno-32-42" href="#__codelineno-32-42"></a><span class="w"> </span><span class="c1">// 回退：撤销选择，恢复到之前的状态</span>
<a id="__codelineno-32-43" name="__codelineno-32-43" href="#__codelineno-32-43"></a><span class="w"> </span><span class="n">undoChoice</span><span class="p">(</span><span class="n">state</span><span class="p">,</span><span class="w"> </span><span class="n">choice</span><span class="p">);</span>
<a id="__codelineno-32-44" name="__codelineno-32-44" href="#__codelineno-32-44"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-32-45" name="__codelineno-32-45" href="#__codelineno-32-45"></a><span class="w"> </span><span class="p">}</span>
<a id="__codelineno-32-46" name="__codelineno-32-46" href="#__codelineno-32-46"></a><span class="p">}</span>
</code></pre></div>
</div>
<div class="tabbed-block">

2
search/search_index.json
View File

File diff suppressed because one or more lines are too long

110
sitemap.xml
Unescape View File

@ -2,277 +2,277 @@
<urlset xmlns="http://www.sitemaps.org/schemas/sitemap/0.9">
<url>
<loc>https://www.hello-algo.com/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_appendix/contribution/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_appendix/installation/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_array_and_linkedlist/array/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_array_and_linkedlist/linked_list/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_array_and_linkedlist/list/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_array_and_linkedlist/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_backtracking/backtracking_algorithm/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_computational_complexity/performance_evaluation/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_computational_complexity/space_complexity/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_computational_complexity/space_time_tradeoff/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_computational_complexity/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_computational_complexity/time_complexity/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_data_structure/classification_of_data_structure/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_data_structure/data_and_memory/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_data_structure/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_graph/graph/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_graph/graph_operations/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_graph/graph_traversal/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_graph/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_hashing/hash_collision/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_hashing/hash_map/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_hashing/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_heap/build_heap/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_heap/heap/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_heap/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_introduction/algorithms_are_everywhere/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_introduction/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_introduction/what_is_dsa/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_preface/about_the_book/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_preface/suggestions/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_preface/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_reference/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_searching/binary_search/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_searching/hashing_search/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_searching/linear_search/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_searching/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/bubble_sort/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/bucket_sort/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/counting_sort/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/insertion_sort/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/merge_sort/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/quick_sort/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/radix_sort/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/sorting_algorithm/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_sorting/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_stack_and_queue/deque/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_stack_and_queue/queue/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_stack_and_queue/stack/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_stack_and_queue/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_tree/avl_tree/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_tree/binary_search_tree/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_tree/binary_tree/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_tree/binary_tree_traversal/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
<url>
<loc>https://www.hello-algo.com/chapter_tree/summary/</loc>
<lastmod>2023-04-15</lastmod>
<lastmod>2023-04-16</lastmod>
<changefreq>daily</changefreq>
</url>
</urlset>

BIN
sitemap.xml.gz
View File

Binary file not shown.
Write Preview
Loading…
Cancel
Save