deploy: 0e66859

Author: acbin

en/lc/2041/index.html

@@ -49757,9 +49757,9 @@
       <ul class="md-nav__list">
 
           <li class="md-nav__item">
-  <a href="#solution-1" class="md-nav__link">
+  <a href="#solution-1-join-tables-grouping-filtering" class="md-nav__link">
     <span class="md-ellipsis">
-      Solution 1
+      Solution 1: Join Tables + Grouping + Filtering
     </span>
   </a>
 
@@ -76523,8 +76523,9 @@ <h2 id="description">Description</h2>
 <h2 id="solutions">Solutions</h2>
 <!-- solution:start -->
 
-<h3 id="solution-1">Solution 1</h3>
-<div class="tabbed-set tabbed-alternate" data-tabs="1:1"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">MySQL</label></div>
+<h3 id="solution-1-join-tables-grouping-filtering">Solution 1: Join Tables + Grouping + Filtering</h3>
+<p>We can join the <code>Candidates</code> table and the <code>Rounds</code> table based on <code>interview_id</code>, filter out candidates with at least 2 years of work experience, then group by <code>candidate_id</code> to calculate the total score for each candidate, and finally filter out candidates with a total score greater than 15.</p>
+<div class="tabbed-set tabbed-alternate" data-tabs="1:2"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><input id="__tabbed_1_2" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">MySQL</label><label for="__tabbed_1_2">Python3</label></div>
 <div class="tabbed-content">
 <div class="tabbed-block">
 <div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
@@ -76537,13 +76538,31 @@ <h3 id="solution-1">Solution 1</h3>
 <span class="normal">8</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="o">#</span><span class="w"> </span><span class="k">Write</span><span class="w"> </span><span class="n">your</span><span class="w"> </span><span class="n">MySQL</span><span class="w"> </span><span class="n">query</span><span class="w"> </span><span class="k">statement</span><span class="w"> </span><span class="n">below</span>
 <span class="k">SELECT</span><span class="w"> </span><span class="n">candidate_id</span>
 <span class="k">FROM</span>
-<span class="w">    </span><span class="n">Candidates</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="k">c</span>
-<span class="w">    </span><span class="k">LEFT</span><span class="w"> </span><span class="k">JOIN</span><span class="w"> </span><span class="n">Rounds</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="n">r</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="k">c</span><span class="p">.</span><span class="n">interview_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">r</span><span class="p">.</span><span class="n">interview_id</span>
+<span class="w">    </span><span class="n">Candidates</span>
+<span class="w">    </span><span class="k">JOIN</span><span class="w"> </span><span class="n">Rounds</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="p">(</span><span class="n">interview_id</span><span class="p">)</span>
 <span class="k">WHERE</span><span class="w"> </span><span class="n">years_of_exp</span><span class="w"> </span><span class="o">&gt;=</span><span class="w"> </span><span class="mi">2</span>
-<span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="k">c</span><span class="p">.</span><span class="n">interview_id</span>
+<span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="mi">1</span>
 <span class="k">HAVING</span><span class="w"> </span><span class="k">SUM</span><span class="p">(</span><span class="n">score</span><span class="p">)</span><span class="w"> </span><span class="o">&gt;</span><span class="w"> </span><span class="mi">15</span><span class="p">;</span>
 </code></pre></div></td></tr></table></div>
 </div>
+<div class="tabbed-block">
+<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
+<span class="normal">2</span>
+<span class="normal">3</span>
+<span class="normal">4</span>
+<span class="normal">5</span>
+<span class="normal">6</span>
+<span class="normal">7</span>
+<span class="normal">8</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="kn">import</span> <span class="nn">pandas</span> <span class="k">as</span> <span class="nn">pd</span>
+
+
+<span class="k">def</span> <span class="nf">accepted_candidates</span><span class="p">(</span><span class="n">candidates</span><span class="p">:</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">,</span> <span class="n">rounds</span><span class="p">:</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">:</span>
+    <span class="n">merged_df</span> <span class="o">=</span> <span class="n">pd</span><span class="o">.</span><span class="n">merge</span><span class="p">(</span><span class="n">candidates</span><span class="p">,</span> <span class="n">rounds</span><span class="p">,</span> <span class="n">on</span><span class="o">=</span><span class="s2">&quot;interview_id&quot;</span><span class="p">)</span>
+    <span class="n">filtered_df</span> <span class="o">=</span> <span class="n">merged_df</span><span class="p">[</span><span class="n">merged_df</span><span class="p">[</span><span class="s2">&quot;years_of_exp&quot;</span><span class="p">]</span> <span class="o">&gt;=</span> <span class="mi">2</span><span class="p">]</span>
+    <span class="n">grouped_df</span> <span class="o">=</span> <span class="n">filtered_df</span><span class="o">.</span><span class="n">groupby</span><span class="p">(</span><span class="s2">&quot;candidate_id&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">agg</span><span class="p">({</span><span class="s2">&quot;score&quot;</span><span class="p">:</span> <span class="s2">&quot;sum&quot;</span><span class="p">})</span>
+    <span class="k">return</span> <span class="n">grouped_df</span><span class="p">[</span><span class="n">grouped_df</span><span class="p">[</span><span class="s2">&quot;score&quot;</span><span class="p">]</span> <span class="o">&gt;</span> <span class="mi">15</span><span class="p">]</span><span class="o">.</span><span class="n">reset_index</span><span class="p">()[[</span><span class="s2">&quot;candidate_id&quot;</span><span class="p">]]</span>
+</code></pre></div></td></tr></table></div>
+</div>
 </div>
 </div>
 <!-- solution:end -->

en/lc/2042/index.html

@@ -49784,15 +49784,6 @@
     </span>
   </a>
 
-</li>
-        
-          <li class="md-nav__item">
-  <a href="#solution-2" class="md-nav__link">
-    <span class="md-ellipsis">
-      Solution 2
-    </span>
-  </a>
-  
 </li>
 
       </ul>
@@ -76730,49 +76721,6 @@ <h3 id="solution-1-simulation">Solution 1: Simulation</h3>
 </div>
 <!-- solution:end -->
 
-<!-- solution:start -->
-
-<h3 id="solution-2">Solution 2</h3>
-<div class="tabbed-set tabbed-alternate" data-tabs="2:1"><input checked="checked" id="__tabbed_2_1" name="__tabbed_2" type="radio" /><div class="tabbed-labels"><label for="__tabbed_2_1">Python3</label></div>
-<div class="tabbed-content">
-<div class="tabbed-block">
-<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal"> 1</span>
-<span class="normal"> 2</span>
-<span class="normal"> 3</span>
-<span class="normal"> 4</span>
-<span class="normal"> 5</span>
-<span class="normal"> 6</span>
-<span class="normal"> 7</span>
-<span class="normal"> 8</span>
-<span class="normal"> 9</span>
-<span class="normal">10</span>
-<span class="normal">11</span>
-<span class="normal">12</span>
-<span class="normal">13</span>
-<span class="normal">14</span>
-<span class="normal">15</span>
-<span class="normal">16</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">class</span> <span class="nc">Solution</span><span class="p">:</span>
-    <span class="k">def</span> <span class="nf">areNumbersAscending</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">s</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">bool</span><span class="p">:</span>
-        <span class="n">pre</span> <span class="o">=</span> <span class="n">i</span> <span class="o">=</span> <span class="mi">0</span>
-        <span class="n">n</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">s</span><span class="p">)</span>
-        <span class="k">while</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">n</span><span class="p">:</span>
-            <span class="k">if</span> <span class="n">s</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">isdigit</span><span class="p">():</span>
-                <span class="n">cur</span> <span class="o">=</span> <span class="mi">0</span>
-                <span class="k">while</span> <span class="n">i</span> <span class="o">&lt;</span> <span class="n">n</span> <span class="ow">and</span> <span class="n">s</span><span class="p">[</span><span class="n">i</span><span class="p">]</span><span class="o">.</span><span class="n">isdigit</span><span class="p">():</span>
-                    <span class="n">cur</span> <span class="o">=</span> <span class="n">cur</span> <span class="o">*</span> <span class="mi">10</span> <span class="o">+</span> <span class="nb">int</span><span class="p">(</span><span class="n">s</span><span class="p">[</span><span class="n">i</span><span class="p">])</span>
-                    <span class="n">i</span> <span class="o">+=</span> <span class="mi">1</span>
-                <span class="k">if</span> <span class="n">pre</span> <span class="o">&gt;=</span> <span class="n">cur</span><span class="p">:</span>
-                    <span class="k">return</span> <span class="kc">False</span>
-                <span class="n">pre</span> <span class="o">=</span> <span class="n">cur</span>
-            <span class="k">else</span><span class="p">:</span>
-                <span class="n">i</span> <span class="o">+=</span> <span class="mi">1</span>
-        <span class="k">return</span> <span class="kc">True</span>
-</code></pre></div></td></tr></table></div>
-</div>
-</div>
-</div>
-<!-- solution:end -->
-
 <!-- problem:end -->
 
 

en/lcci/16.11/index.html

@@ -76647,6 +76647,41 @@ <h3 id="solution-1-case-analysis">Solution 1: Case Analysis</h3>
 
 
 
+  <aside class="md-source-file">
+    
+    
+    
+    
+      
+  <span class="md-source-file__fact">
+    
+      
+  <span class="md-icon" title="Contributors">
+    <svg xmlns="http://www.w3.org/2000/svg" viewBox="0 0 24 24"><path d="M12 2A10 10 0 0 0 2 12c0 4.42 2.87 8.17 6.84 9.5.5.08.66-.23.66-.5v-1.69c-2.77.6-3.36-1.34-3.36-1.34-.46-1.16-1.11-1.47-1.11-1.47-.91-.62.07-.6.07-.6 1 .07 1.53 1.03 1.53 1.03.87 1.52 2.34 1.07 2.91.83.09-.65.35-1.09.63-1.34-2.22-.25-4.55-1.11-4.55-4.92 0-1.11.38-2 1.03-2.71-.1-.25-.45-1.29.1-2.64 0 0 .84-.27 2.75 1.02.79-.22 1.65-.33 2.5-.33.85 0 1.71.11 2.5.33 1.91-1.29 2.75-1.02 2.75-1.02.55 1.35.2 2.39.1 2.64.65.71 1.03 1.6 1.03 2.71 0 3.82-2.34 4.66-4.57 4.91.36.31.69.92.69 1.85V21c0 .27.16.59.67.5C19.14 20.16 22 16.42 22 12A10 10 0 0 0 12 2Z"/></svg>
+  </span>
+  <span>GitHub</span>
+
+    
+    <nav>
+      
+        <a href="https://github.com/yanglbme" class="md-author" title="@yanglbme">
+          
+          <img src="https://avatars.githubusercontent.com/u/21008209?v=4&size=72" alt="yanglbme">
+        </a>
+      
+        <a href="https://github.com/klever34" class="md-author" title="@klever34">
+          
+          <img src="https://avatars.githubusercontent.com/u/12745225?v=4&size=72" alt="klever34">
+        </a>
+      
+      
+      
+    </nav>
+  </span>
+
+    
+  </aside>
+
 
 
 

en/search/search_index.json

@@ -49799,7 +49799,7 @@
           <li class="md-nav__item">
   <a href="#_3" class="md-nav__link">
     <span class="md-ellipsis">
-      方法一
+      方法一：连接表 + 分组 + 过滤
     </span>
   </a>
 
@@ -81124,8 +81124,9 @@ <h2 id="_1">题目描述</h2>
 <h2 id="_2">解法</h2>
 <!-- solution:start -->
 
-<h3 id="_3">方法一</h3>
-<div class="tabbed-set tabbed-alternate" data-tabs="1:1"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">MySQL</label></div>
+<h3 id="_3">方法一：连接表 + 分组 + 过滤</h3>
+<p>我们可以将 <code>Candidates</code> 表和 <code>Rounds</code> 表按照 <code>interview_id</code> 进行连接，筛选出工作年限至少为 2 年的候选人，然后按照 <code>candidate_id</code> 进行分组，计算每个候选人的总分，最后筛选出总分大于 15 分的候选人。</p>
+<div class="tabbed-set tabbed-alternate" data-tabs="1:2"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><input id="__tabbed_1_2" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">MySQL</label><label for="__tabbed_1_2">Python3</label></div>
 <div class="tabbed-content">
 <div class="tabbed-block">
 <div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
@@ -81138,13 +81139,31 @@ <h3 id="_3">方法一</h3>
 <span class="normal">8</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="o">#</span><span class="w"> </span><span class="k">Write</span><span class="w"> </span><span class="n">your</span><span class="w"> </span><span class="n">MySQL</span><span class="w"> </span><span class="n">query</span><span class="w"> </span><span class="k">statement</span><span class="w"> </span><span class="n">below</span>
 <span class="k">SELECT</span><span class="w"> </span><span class="n">candidate_id</span>
 <span class="k">FROM</span>
-<span class="w">    </span><span class="n">Candidates</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="k">c</span>
-<span class="w">    </span><span class="k">LEFT</span><span class="w"> </span><span class="k">JOIN</span><span class="w"> </span><span class="n">Rounds</span><span class="w"> </span><span class="k">AS</span><span class="w"> </span><span class="n">r</span><span class="w"> </span><span class="k">ON</span><span class="w"> </span><span class="k">c</span><span class="p">.</span><span class="n">interview_id</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="n">r</span><span class="p">.</span><span class="n">interview_id</span>
+<span class="w">    </span><span class="n">Candidates</span>
+<span class="w">    </span><span class="k">JOIN</span><span class="w"> </span><span class="n">Rounds</span><span class="w"> </span><span class="k">USING</span><span class="w"> </span><span class="p">(</span><span class="n">interview_id</span><span class="p">)</span>
 <span class="k">WHERE</span><span class="w"> </span><span class="n">years_of_exp</span><span class="w"> </span><span class="o">&gt;=</span><span class="w"> </span><span class="mi">2</span>
-<span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="k">c</span><span class="p">.</span><span class="n">interview_id</span>
+<span class="k">GROUP</span><span class="w"> </span><span class="k">BY</span><span class="w"> </span><span class="mi">1</span>
 <span class="k">HAVING</span><span class="w"> </span><span class="k">SUM</span><span class="p">(</span><span class="n">score</span><span class="p">)</span><span class="w"> </span><span class="o">&gt;</span><span class="w"> </span><span class="mi">15</span><span class="p">;</span>
 </code></pre></div></td></tr></table></div>
 </div>
+<div class="tabbed-block">
+<div class="highlight"><table class="highlighttable"><tr><td class="linenos"><div class="linenodiv"><pre><span></span><span class="normal">1</span>
+<span class="normal">2</span>
+<span class="normal">3</span>
+<span class="normal">4</span>
+<span class="normal">5</span>
+<span class="normal">6</span>
+<span class="normal">7</span>
+<span class="normal">8</span></pre></div></td><td class="code"><div><pre><span></span><code><span class="kn">import</span> <span class="nn">pandas</span> <span class="k">as</span> <span class="nn">pd</span>
+
+
+<span class="k">def</span> <span class="nf">accepted_candidates</span><span class="p">(</span><span class="n">candidates</span><span class="p">:</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">,</span> <span class="n">rounds</span><span class="p">:</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="n">pd</span><span class="o">.</span><span class="n">DataFrame</span><span class="p">:</span>
+    <span class="n">merged_df</span> <span class="o">=</span> <span class="n">pd</span><span class="o">.</span><span class="n">merge</span><span class="p">(</span><span class="n">candidates</span><span class="p">,</span> <span class="n">rounds</span><span class="p">,</span> <span class="n">on</span><span class="o">=</span><span class="s2">&quot;interview_id&quot;</span><span class="p">)</span>
+    <span class="n">filtered_df</span> <span class="o">=</span> <span class="n">merged_df</span><span class="p">[</span><span class="n">merged_df</span><span class="p">[</span><span class="s2">&quot;years_of_exp&quot;</span><span class="p">]</span> <span class="o">&gt;=</span> <span class="mi">2</span><span class="p">]</span>
+    <span class="n">grouped_df</span> <span class="o">=</span> <span class="n">filtered_df</span><span class="o">.</span><span class="n">groupby</span><span class="p">(</span><span class="s2">&quot;candidate_id&quot;</span><span class="p">)</span><span class="o">.</span><span class="n">agg</span><span class="p">({</span><span class="s2">&quot;score&quot;</span><span class="p">:</span> <span class="s2">&quot;sum&quot;</span><span class="p">})</span>
+    <span class="k">return</span> <span class="n">grouped_df</span><span class="p">[</span><span class="n">grouped_df</span><span class="p">[</span><span class="s2">&quot;score&quot;</span><span class="p">]</span> <span class="o">&gt;</span> <span class="mi">15</span><span class="p">]</span><span class="o">.</span><span class="n">reset_index</span><span class="p">()[[</span><span class="s2">&quot;candidate_id&quot;</span><span class="p">]]</span>
+</code></pre></div></td></tr></table></div>
+</div>
 </div>
 </div>
 <!-- solution:end -->