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index.html
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数位 DP</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2024-03-13 23:59:06" datetime=2024-03-13T23:59:06+00:00>2024-03-13</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/LeetCode/ itemprop=url rel=index><span itemprop=name>LeetCode</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>See <a href=https://leetcode.cn/problems/number-of-digit-one/solutions/1750339/by-endlesscheng-h9ua/ rel=noopener target=_blank>数位 DP 通用模板，附题单（Python/Java/C++/Go）</a>.<h3 id=233-Number-of-Digit-One><a title="233. Number of Digit One" class=headerlink href=#233-Number-of-Digit-One></a>233. Number of Digit One</h3><figure class="highlight python"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br><span class=line>3</span><br><span class=line>4</span><br><span class=line>5</span><br><span class=line>6</span><br><span class=line>7</span><br><span class=line>8</span><br><span class=line>9</span><br><span class=line>10</span><br><span class=line>11</span><br><span class=line>12</span><br><span class=line>13</span><br></pre><td class=code><pre><span class=line><span class=keyword>class</span> <span class="title class_">Solution</span>:</span><br><span class=line> <span class=keyword>def</span> <span class="title function_">countDigitOne</span>(<span class=params>self, n: <span class=built_in>int</span></span>) -> <span class=built_in>int</span>:</span><br><span class=line> s = <span class=built_in>str</span>(n)</span><br><span class=line><span class=meta> @cache</span></span><br><span class=line> <span class=keyword>def</span> <span class="title function_">f</span>(<span class=params>i: <span class=built_in>int</span>, cnt1: <span class=built_in>int</span>, is_limit: <span class=built_in>bool</span></span>) -> <span class=built_in>int</span>:</span><br><span class=line> <span class=keyword>if</span> i == <span class=built_in>len</span>(s):</span><br><span class=line> <span class=keyword>return</span> cnt1</span><br><span class=line> res = <span class=number>0</span></span><br><span class=line> up = <span class=built_in>int</span>(s[i]) <span class=keyword>if</span> is_limit <span class=keyword>else</span> <span class=number>9</span></span><br><span class=line> <span class=keyword>for</span> d <span class=keyword>in</span> <span class=built_in>range</span>(up + <span class=number>1</span>):</span><br><span class=line> res += f(i + <span class=number>1</span>, cnt1 + (d == <span class=number>1</span>), is_limit <span class=keyword>and</span> d == up)</span><br><span class=line> <span class=keyword>return</span> res</span><br><span class=line> <span class=keyword>return</span> f(<span class=number>0</span>, <span class=number>0</span>, <span class=literal>True</span>)</span><br></pre></table></figure><!--noindex--><div class=post-button><a class=btn href=/LeetCode/leetcode-%E6%95%B0%E4%BD%8D-dp/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/LeetCode/leetcode-dijkstra/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/LeetCode/leetcode-dijkstra/ itemprop=url>LeetCode - Dijkstra</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2024-03-09 23:46:49" datetime=2024-03-09T23:46:49+00:00>2024-03-09</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/LeetCode/ itemprop=url rel=index><span itemprop=name>LeetCode</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>See <a href=https://leetcode.cn/problems/network-delay-time/solutions/2668220/liang-chong-dijkstra-xie-fa-fu-ti-dan-py-ooe8/ rel=noopener target=_blank>两种 Dijkstra 写法（附题单）Python/Java/C++/Go/JS/Rust</a>.<h3 id=743-Network-Delay-Time><a title="743. Network Delay Time" class=headerlink href=#743-Network-Delay-Time></a>743. Network Delay Time</h3><figure class="highlight python"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br><span class=line>3</span><br><span class=line>4</span><br><span class=line>5</span><br><span class=line>6</span><br><span class=line>7</span><br><span class=line>8</span><br><span class=line>9</span><br><span class=line>10</span><br><span class=line>11</span><br><span class=line>12</span><br><span class=line>13</span><br><span class=line>14</span><br><span class=line>15</span><br><span class=line>16</span><br><span class=line>17</span><br><span class=line>18</span><br><span class=line>19</span><br></pre><td class=code><pre><span class=line><span class=keyword>class</span> <span class="title class_">Solution</span>:</span><br><span class=line> <span class=keyword>def</span> <span class="title function_">networkDelayTime</span>(<span class=params>self, times: <span class=type>List</span>[<span class=type>List</span>[<span class=built_in>int</span>]], n: <span class=built_in>int</span>, k: <span class=built_in>int</span></span>) -> <span class=built_in>int</span>:</span><br><span class=line> g = [[] <span class=keyword>for</span> _ <span class=keyword>in</span> <span class=built_in>range</span>(n)]</span><br><span class=line> <span class=keyword>for</span> x, y, d <span class=keyword>in</span> times:</span><br><span class=line> g[x - <span class=number>1</span>].append((y - <span class=number>1</span>, d))</span><br><span class=line> dis = [inf] * n</span><br><span class=line> dis[k - <span class=number>1</span>] = <span class=number>0</span></span><br><span class=line> h = [(<span class=number>0</span>, k - <span class=number>1</span>)]</span><br><span class=line> <span class=keyword>while</span> h:</span><br><span class=line> dx, x = heappop(h)</span><br><span class=line> <span class=keyword>if</span> dx > dis[x]:</span><br><span class=line> <span class=keyword>continue</span></span><br><span class=line> <span class=keyword>for</span> y, d <span class=keyword>in</span> g[x]:</span><br><span class=line> new_dis = dx + d</span><br><span class=line> <span class=keyword>if</span> new_dis < dis[y]:</span><br><span class=line> dis[y] = new_dis</span><br><span class=line> heappush(h, (new_dis, y))</span><br><span class=line> mx = <span class=built_in>max</span>(dis)</span><br><span class=line> <span class=keyword>return</span> mx <span class=keyword>if</span> mx < inf <span class=keyword>else</span> -<span class=number>1</span></span><br></pre></table></figure><!--noindex--><div class=post-button><a class=btn href=/LeetCode/leetcode-dijkstra/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/LeetCode/leetcode-linear-dp/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/LeetCode/leetcode-linear-dp/ itemprop=url>LeetCode - Linear DP</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2024-03-09 16:13:55" datetime=2024-03-09T16:13:55+00:00>2024-03-09</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/LeetCode/ itemprop=url rel=index><span itemprop=name>LeetCode</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>See <a href=https://leetcode.cn/problems/maximize-the-profit-as-the-salesman/solutions/2396402/xian-xing-dpfu-xiang-si-ti-mu-pythonjava-wmh7/ rel=noopener target=_blank>线性 DP，附相似题目（Python/Java/C++/Go）</a><h3 id=2830-Maximize-the-Profit-as-the-Salesman><a title="2830. Maximize the Profit as the Salesman" class=headerlink href=#2830-Maximize-the-Profit-as-the-Salesman></a>2830. Maximize the Profit as the Salesman</h3><figure class="highlight python"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br><span class=line>3</span><br><span class=line>4</span><br><span class=line>5</span><br><span class=line>6</span><br><span class=line>7</span><br><span class=line>8</span><br><span class=line>9</span><br><span class=line>10</span><br><span class=line>11</span><br></pre><td class=code><pre><span class=line><span class=keyword>class</span> <span class="title class_">Solution</span>:</span><br><span class=line> <span class=keyword>def</span> <span class="title function_">maximizeTheProfit</span>(<span class=params>self, n: <span class=built_in>int</span>, offers: <span class=type>List</span>[<span class=type>List</span>[<span class=built_in>int</span>]]</span>) -> <span class=built_in>int</span>:</span><br><span class=line> groups = [[] <span class=keyword>for</span> _ <span class=keyword>in</span> <span class=built_in>range</span>(n)]</span><br><span class=line> <span class=keyword>for</span> start, end, gold <span class=keyword>in</span> offers:</span><br><span class=line> groups[end].append((start, gold))</span><br><span class=line> f = [<span class=number>0</span>] * (n + <span class=number>1</span>)</span><br><span class=line> <span class=keyword>for</span> end, g <span class=keyword>in</span> <span class=built_in>enumerate</span>(groups):</span><br><span class=line> f[end + <span class=number>1</span>] = f[end]</span><br><span class=line> <span class=keyword>for</span> start, gold <span class=keyword>in</span> g:</span><br><span class=line> f[end + <span class=number>1</span>] = <span class=built_in>max</span>(f[end + <span class=number>1</span>], f[start] + gold)</span><br><span class=line> <span class=keyword>return</span> f[n]</span><br></pre></table></figure><h3 id=2008-Maximum-Earnings-From-Taxi><a title="2008. Maximum Earnings From Taxi" class=headerlink href=#2008-Maximum-Earnings-From-Taxi></a>2008. Maximum Earnings From Taxi</h3><figure class="highlight python"><table><tr><td class=gutter><pre><span class=line>1</span><br><span class=line>2</span><br><span class=line>3</span><br><span class=line>4</span><br><span class=line>5</span><br><span class=line>6</span><br><span class=line>7</span><br><span class=line>8</span><br><span class=line>9</span><br><span class=line>10</span><br><span class=line>11</span><br></pre><td class=code><pre><span class=line><span class=keyword>class</span> <span class="title class_">Solution</span>:</span><br><span class=line> <span class=keyword>def</span> <span class="title function_">maxTaxiEarnings</span>(<span class=params>self, n: <span class=built_in>int</span>, rides: <span class=type>List</span>[<span class=type>List</span>[<span class=built_in>int</span>]]</span>) -> <span class=built_in>int</span>:</span><br><span class=line> groups = [[] <span class=keyword>for</span> _ <span class=keyword>in</span> <span class=built_in>range</span>(n)]</span><br><span class=line> <span class=keyword>for</span> start, end, tip <span class=keyword>in</span> rides:</span><br><span class=line> groups[end - <span class=number>1</span>].append((start - <span class=number>1</span>, end - start + tip))</span><br><span class=line> f = [<span class=number>0</span>] * (n + <span class=number>1</span>)</span><br><span class=line> <span class=keyword>for</span> end, g <span class=keyword>in</span> <span class=built_in>enumerate</span>(groups):</span><br><span class=line> f[end + <span class=number>1</span>] = f[end]</span><br><span class=line> <span class=keyword>for</span> start, profit <span class=keyword>in</span> g:</span><br><span class=line> f[end + <span class=number>1</span>] = <span class=built_in>max</span>(f[end + <span class=number>1</span>], f[start + <span class=number>1</span>] + profit)</span><br><span class=line> <span class=keyword>return</span> f[n]</span><br></pre></table></figure><!--noindex--><div class=post-button><a class=btn href=/LeetCode/leetcode-linear-dp/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%85%AB-%E7%94%9F%E6%88%90%E6%A0%91/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%85%AB-%E7%94%9F%E6%88%90%E6%A0%91/ itemprop=url>kuangbin 专题八 生成树</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2023-12-13 23:39:17" datetime=2023-12-13T23:39:17+00:00>2023-12-13</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/kuangbin/ itemprop=url rel=index><span itemprop=name>kuangbin</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><h3 id=POJ-1679-The-Unique-MST><a title="POJ-1679 The Unique MST" class=headerlink href=#POJ-1679-The-Unique-MST></a>POJ-1679 The Unique MST</h3><!--noindex--><div class=post-button><a class=btn href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%85%AB-%E7%94%9F%E6%88%90%E6%A0%91/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%B8%83-%E7%BA%BF%E6%AE%B5%E6%A0%91/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%B8%83-%E7%BA%BF%E6%AE%B5%E6%A0%91/ itemprop=url>kuangbin 专题七 线段树</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2023-08-28 23:20:50" datetime=2023-08-28T23:20:50+00:00>2023-08-28</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/kuangbin/ itemprop=url rel=index><span itemprop=name>kuangbin</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>题目详单见 <a href=https://vjudge.net/article/187 rel=noopener target=_blank>[kuangbin带你飞]专题1-23</a>。<br>算法介绍见 <a href=https://oi-wiki.org/ds/seg/ rel=noopener target=_blank>线段树 - OI Wiki</a>。<h3 id=HDU-1166-敌兵布阵><a title="HDU-1166 敌兵布阵" class=headerlink href=#HDU-1166-敌兵布阵></a>HDU-1166 敌兵布阵</h3><p>线段树求区间和模板题，单点更新，区间求和。也可以用树状数组。<!--noindex--><div class=post-button><a class=btn href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%B8%83-%E7%BA%BF%E6%AE%B5%E6%A0%91/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%85%AD-%E6%9C%80%E5%B0%8F%E7%94%9F%E6%88%90%E6%A0%91/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%85%AD-%E6%9C%80%E5%B0%8F%E7%94%9F%E6%88%90%E6%A0%91/ itemprop=url>kuangbin 专题六 最小生成树</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2023-08-27 00:51:09" datetime=2023-08-27T00:51:09+00:00>2023-08-27</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/kuangbin/ itemprop=url rel=index><span itemprop=name>kuangbin</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>题目详单见 <a href=https://vjudge.net/article/187 rel=noopener target=_blank>[kuangbin带你飞]专题1-23</a>。<br>算法介绍见 <a href=https://oi-wiki.org/graph/mst/ rel=noopener target=_blank>最小生成树 - OI Wiki</a>。<h3 id=POJ-1251-HDU-1301-Jungle-Roads><a title="POJ-1251/HDU-1301 Jungle Roads" class=headerlink href=#POJ-1251-HDU-1301-Jungle-Roads></a>POJ-1251/HDU-1301 Jungle Roads</h3><p>最小生成树模板题。<!--noindex--><div class=post-button><a class=btn href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%85%AD-%E6%9C%80%E5%B0%8F%E7%94%9F%E6%88%90%E6%A0%91/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%BA%94-%E5%B9%B6%E6%9F%A5%E9%9B%86/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%BA%94-%E5%B9%B6%E6%9F%A5%E9%9B%86/ itemprop=url>kuangbin 专题五 并查集</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2023-08-19 16:13:16" datetime=2023-08-19T16:13:16+00:00>2023-08-19</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/kuangbin/ itemprop=url rel=index><span itemprop=name>kuangbin</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>题目详单见 <a href=https://vjudge.net/article/187 rel=noopener target=_blank>[kuangbin带你飞]专题1-23</a>。<br>算法介绍见 <a href=https://oi-wiki.org/ds/dsu/ rel=noopener target=_blank>并查集 - OI Wiki</a>。<h3 id=POJ-2236-Wireless-Network><a title="POJ-2236 Wireless Network" class=headerlink href=#POJ-2236-Wireless-Network></a>POJ-2236 Wireless Network</h3><p>每修复一台电脑，就尝试连接其他已修复的电脑，使用并查集维护连通关系。<!--noindex--><div class=post-button><a class=btn href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%BA%94-%E5%B9%B6%E6%9F%A5%E9%9B%86/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%9B%9B-%E6%9C%80%E7%9F%AD%E8%B7%AF%E7%BB%83%E4%B9%A0/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%9B%9B-%E6%9C%80%E7%9F%AD%E8%B7%AF%E7%BB%83%E4%B9%A0/ itemprop=url>kuangbin 专题四 最短路练习</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2023-08-06 23:13:45" datetime=2023-08-06T23:13:45+00:00>2023-08-06</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/kuangbin/ itemprop=url rel=index><span itemprop=name>kuangbin</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>题目详单见 <a href=https://vjudge.net/article/187 rel=noopener target=_blank>[kuangbin带你飞]专题1-23</a>。<br>算法介绍见 <a href=https://oi-wiki.org/graph/shortest-path/ rel=noopener target=_blank>最短路 - OI Wiki</a>。<h3 id=POJ-2387-Til-the-Cows-Come-Home><a title="POJ-2387 Til the Cows Come Home" class=headerlink href=#POJ-2387-Til-the-Cows-Come-Home></a>POJ-2387 Til the Cows Come Home</h3><p>求最短路，方法参见 <a href=https://oi-wiki.org/graph/shortest-path/ rel=noopener target=_blank>最短路 - OI Wiki</a>。<!--noindex--><div class=post-button><a class=btn href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E5%9B%9B-%E6%9C%80%E7%9F%AD%E8%B7%AF%E7%BB%83%E4%B9%A0/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%B8%89-dancing-links/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%B8%89-dancing-links/ itemprop=url>kuangbin 专题三 Dancing Links</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2023-08-06 16:18:11" datetime=2023-08-06T16:18:11+00:00>2023-08-06</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/kuangbin/ itemprop=url rel=index><span itemprop=name>kuangbin</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>题目详单见 <a href=https://vjudge.net/article/187 rel=noopener target=_blank>[kuangbin带你飞]专题1-23</a>。<br>算法介绍见 <a href=https://oi-wiki.org/search/dlx/ rel=noopener target=_blank>Dancing Links - OI Wiki</a>。<p>// TODO<!--noindex--><div class=post-button><a class=btn href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%B8%89-dancing-links/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><div class=post-block><article class=post-content itemscope itemtype=http://schema.org/Article><link href=https://peichengliu.github.io/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%BA%8C-%E6%90%9C%E7%B4%A2%E8%BF%9B%E9%98%B6/ itemprop=mainEntityOfPage><span hidden itemprop=author itemscope itemtype=http://schema.org/Person> <meta content=/images/avatar.gif itemprop=image> <meta content=Shawn itemprop=name> </span><span hidden itemprop=publisher itemscope itemtype=http://schema.org/Organization> <meta content="Shawn's Blog" itemprop=name> <meta content=若有恒，何必三更眠五更起；最无益，莫过一日曝十日寒。 itemprop=description> </span><span hidden itemprop=post itemscope itemtype=http://schema.org/CreativeWork> <meta content="undefined | Shawn's Blog" itemprop=name> <meta itemprop=description> </span><header class=post-header><h2 itemprop="name headline" class=post-title><a class=post-title-link href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%BA%8C-%E6%90%9C%E7%B4%A2%E8%BF%9B%E9%98%B6/ itemprop=url>kuangbin 专题二 搜索进阶</a></h2><div class=post-meta-container><div class=post-meta><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar"></i> </span> <span class=post-meta-item-text>Posted on</span> <time itemprop="dateCreated datePublished" title="Created: 2023-07-29 17:06:14" datetime=2023-07-29T17:06:14+00:00>2023-07-29</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-calendar-check"></i> </span> <span class=post-meta-item-text>Edited on</span> <time title="Modified: 2024-11-24 10:31:47" datetime=2024-11-24T10:31:47+00:00 itemprop=dateModified>2024-11-24</time> </span><span class=post-meta-item> <span class=post-meta-item-icon> <i class="far fa-folder"></i> </span> <span class=post-meta-item-text>In</span> <span itemprop=about itemscope itemtype=http://schema.org/Thing> <a href=/categories/kuangbin/ itemprop=url rel=index><span itemprop=name>kuangbin</span></a> </span> </span></div></div></header><div class=post-body itemprop=articleBody><p>题目详单见 <a href=https://vjudge.net/article/187 rel=noopener target=_blank>[kuangbin带你飞]专题1-23</a>。<br>算法介绍见 <a href=https://oi-wiki.org/search/ rel=noopener target=_blank>搜索部分简介 - OI Wiki</a>。<h3 id=HDU-1043-Eight><a title="HDU-1043 Eight" class=headerlink href=#HDU-1043-Eight></a>HDU-1043 Eight</h3><p>用康托展开将状态映射成排列数的字典序下标，然后<ul><li>用 BFS 预处理初始状态（123456789）到其他所有状态的路径，<li>或者结合数学上八数码问题是否有解的判别方法和 A* 算法（有解时）。</ul><!--noindex--><div class=post-button><a class=btn href=/kuangbin/kuangbin-%E4%B8%93%E9%A2%98%E4%BA%8C-%E6%90%9C%E7%B4%A2%E8%BF%9B%E9%98%B6/#more rel=contents> Read more » </a></div><!--/noindex--></div><footer class=post-footer><div class=post-eof></div></footer></article></div><nav class=pagination><span class="page-number current">1</span><a class=page-number href=/page/2/>2</a><span class=space>…</span><a class=page-number href=/page/40/>40</a><a aria-label="Next page" class="extend next" title="Next page" href=/page/2/ rel=next><i class="fa 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