deploy: fe5cddc

Author: yanglbme

en/lc/2054/index.html

@@ -52813,18 +52813,9 @@
       <ul class="md-nav__list">
 
           <li class="md-nav__item">
-  <a href="#solution-1" class="md-nav__link">
+  <a href="#solution-1-brute-force-enumeration-hash-table" class="md-nav__link">
     <span class="md-ellipsis">
-      Solution 1
-    </span>
-  </a>
-  
-</li>
-        
-          <li class="md-nav__item">
-  <a href="#solution-2" class="md-nav__link">
-    <span class="md-ellipsis">
-      Solution 2
+      Solution 1: Brute Force Enumeration + Hash Table
     </span>
   </a>
 
@@ -86424,19 +86415,35 @@ <h2 id="description">Description</h2>
 <h2 id="solutions">Solutions</h2>
 <!-- solution:start -->
 
-<h3 id="solution-1">Solution 1</h3>
+<h3 id="solution-1-brute-force-enumeration-hash-table">Solution 1: Brute Force Enumeration + Hash Table</h3>
+<p>We can enumerate the left endpoint <span class="arithmatex">\(i\)</span> of the substring. For the current left endpoint, maintain a hash table to record the vowels that appear in the current substring. Then enumerate the right endpoint <span class="arithmatex">\(j\)</span>. If the character at the current right endpoint is not a vowel, break the loop. Otherwise, add the character at the current right endpoint to the hash table. If the number of elements in the hash table is <span class="arithmatex">\(5\)</span>, it means the current substring is a vowel substring, and increment the result by <span class="arithmatex">\(1\)</span>.</p>
+<p>The time complexity is <span class="arithmatex">\(O(n^2)\)</span>, and the space complexity is <span class="arithmatex">\(O(C)\)</span>. Here, <span class="arithmatex">\(n\)</span> is the length of the string <span class="arithmatex">\(word\)</span>, and <span class="arithmatex">\(C\)</span> is the size of the character set, which is <span class="arithmatex">\(5\)</span> in this problem.</p>
 <div class="tabbed-set tabbed-alternate" data-tabs="1:5"><input checked="checked" id="__tabbed_1_1" name="__tabbed_1" type="radio" /><input id="__tabbed_1_2" name="__tabbed_1" type="radio" /><input id="__tabbed_1_3" name="__tabbed_1" type="radio" /><input id="__tabbed_1_4" name="__tabbed_1" type="radio" /><input id="__tabbed_1_5" name="__tabbed_1" type="radio" /><div class="tabbed-labels"><label for="__tabbed_1_1">Python3</label><label for="__tabbed_1_2">Java</label><label for="__tabbed_1_3">C++</label><label for="__tabbed_1_4">Go</label><label for="__tabbed_1_5">TypeScript</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></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">class</span><span class="w"> </span><span class="nc">Solution</span><span class="p">:</span>
+<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></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">class</span><span class="w"> </span><span class="nc">Solution</span><span class="p">:</span>
     <span class="k">def</span><span class="w"> </span><span class="nf">countVowelSubstrings</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">word</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">int</span><span class="p">:</span>
-        <span class="n">n</span> <span class="o">=</span> <span class="nb">len</span><span class="p">(</span><span class="n">word</span><span class="p">)</span>
-        <span class="n">s</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="s1">&#39;aeiou&#39;</span><span class="p">)</span>
-        <span class="k">return</span> <span class="nb">sum</span><span class="p">(</span><span class="nb">set</span><span class="p">(</span><span class="n">word</span><span class="p">[</span><span class="n">i</span><span class="p">:</span><span class="n">j</span><span class="p">])</span> <span class="o">==</span> <span class="n">s</span> <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">n</span><span class="p">)</span> <span class="k">for</span> <span class="n">j</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">i</span> <span class="o">+</span> <span class="mi">1</span><span class="p">,</span> <span class="n">n</span> <span class="o">+</span> <span class="mi">1</span><span class="p">))</span>
+        <span class="n">s</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="s2">&quot;aeiou&quot;</span><span class="p">)</span>
+        <span class="n">ans</span><span class="p">,</span> <span class="n">n</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">word</span><span class="p">)</span>
+        <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">n</span><span class="p">):</span>
+            <span class="n">t</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
+            <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">word</span><span class="p">[</span><span class="n">i</span><span class="p">:]:</span>
+                <span class="k">if</span> <span class="n">c</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">s</span><span class="p">:</span>
+                    <span class="k">break</span>
+                <span class="n">t</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">c</span><span class="p">)</span>
+                <span class="n">ans</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">t</span><span class="p">)</span> <span class="o">==</span> <span class="mi">5</span>
+        <span class="k">return</span> <span class="n">ans</span>
 </code></pre></div></td></tr></table></div>
 </div>
 <div class="tabbed-block">
@@ -86611,41 +86618,6 @@ <h3 id="solution-1">Solution 1</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></pre></div></td><td class="code"><div><pre><span></span><code><span class="k">class</span><span class="w"> </span><span class="nc">Solution</span><span class="p">:</span>
-    <span class="k">def</span><span class="w"> </span><span class="nf">countVowelSubstrings</span><span class="p">(</span><span class="bp">self</span><span class="p">,</span> <span class="n">word</span><span class="p">:</span> <span class="nb">str</span><span class="p">)</span> <span class="o">-&gt;</span> <span class="nb">int</span><span class="p">:</span>
-        <span class="n">s</span> <span class="o">=</span> <span class="nb">set</span><span class="p">(</span><span class="s1">&#39;aeiou&#39;</span><span class="p">)</span>
-        <span class="n">ans</span><span class="p">,</span> <span class="n">n</span> <span class="o">=</span> <span class="mi">0</span><span class="p">,</span> <span class="nb">len</span><span class="p">(</span><span class="n">word</span><span class="p">)</span>
-        <span class="k">for</span> <span class="n">i</span> <span class="ow">in</span> <span class="nb">range</span><span class="p">(</span><span class="n">n</span><span class="p">):</span>
-            <span class="n">t</span> <span class="o">=</span> <span class="nb">set</span><span class="p">()</span>
-            <span class="k">for</span> <span class="n">c</span> <span class="ow">in</span> <span class="n">word</span><span class="p">[</span><span class="n">i</span><span class="p">:]:</span>
-                <span class="k">if</span> <span class="n">c</span> <span class="ow">not</span> <span class="ow">in</span> <span class="n">s</span><span class="p">:</span>
-                    <span class="k">break</span>
-                <span class="n">t</span><span class="o">.</span><span class="n">add</span><span class="p">(</span><span class="n">c</span><span class="p">)</span>
-                <span class="n">ans</span> <span class="o">+=</span> <span class="nb">len</span><span class="p">(</span><span class="n">t</span><span class="p">)</span> <span class="o">==</span> <span class="mi">5</span>
-        <span class="k">return</span> <span class="n">ans</span>
-</code></pre></div></td></tr></table></div>
-</div>
-</div>
-</div>
-<!-- solution:end -->
-
 <!-- problem:end -->