deploy: aa1a162

Author: yanglbme

en/lc/989/index.html

@@ -29283,9 +29283,9 @@
       <ul class="md-nav__list">
 
           <li class="md-nav__item">
-  <a href="#solution-1" class="md-nav__link">
+  <a href="#solution-1-reverse-calculation" class="md-nav__link">
     <span class="md-ellipsis">
-      Solution 1
+      Solution 1: Reverse Calculation
     </span>
   </a>
 
@@ -86792,8 +86792,10 @@ <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="1:4"><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" /><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></div>
+<h3 id="solution-1-reverse-calculation">Solution 1: Reverse Calculation</h3>
+<p>We can use a reverse calculation method, starting from <span class="arithmatex">\(\textit{target}\)</span>. If <span class="arithmatex">\(\textit{target}\)</span> is odd, then <span class="arithmatex">\(\textit{target} = \textit{target} + 1\)</span>, otherwise <span class="arithmatex">\(\textit{target} = \textit{target} / 2\)</span>. We accumulate the number of operations until <span class="arithmatex">\(\textit{target} \leq \textit{startValue}\)</span>. The final result is the number of operations plus <span class="arithmatex">\(\textit{startValue} - \textit{target}\)</span>.</p>
+<p>The time complexity is <span class="arithmatex">\(O(\log n)\)</span>, where <span class="arithmatex">\(n\)</span> is <span class="arithmatex">\(\textit{target}\)</span>. The space complexity is <span class="arithmatex">\(O(1)\)</span>.</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>
@@ -86911,6 +86913,32 @@ <h3 id="solution-1">Solution 1</h3>
 <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>
+<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="kd">function</span><span class="w"> </span><span class="nx">brokenCalc</span><span class="p">(</span><span class="nx">startValue</span><span class="o">:</span><span class="w"> </span><span class="kt">number</span><span class="p">,</span><span class="w"> </span><span class="nx">target</span><span class="o">:</span><span class="w"> </span><span class="kt">number</span><span class="p">)</span><span class="o">:</span><span class="w"> </span><span class="kt">number</span><span class="w"> </span><span class="p">{</span>
+<span class="w">    </span><span class="kd">let</span><span class="w"> </span><span class="nx">ans</span><span class="w"> </span><span class="o">=</span><span class="w"> </span><span class="mf">0</span><span class="p">;</span>
+<span class="w">    </span><span class="k">for</span><span class="w"> </span><span class="p">(;</span><span class="w"> </span><span class="nx">startValue</span><span class="w"> </span><span class="o">&lt;</span><span class="w"> </span><span class="nx">target</span><span class="p">;</span><span class="w"> </span><span class="o">++</span><span class="nx">ans</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">        </span><span class="k">if</span><span class="w"> </span><span class="p">(</span><span class="nx">target</span><span class="w"> </span><span class="o">&amp;</span><span class="w"> </span><span class="mf">1</span><span class="p">)</span><span class="w"> </span><span class="p">{</span>
+<span class="w">            </span><span class="o">++</span><span class="nx">target</span><span class="p">;</span>
+<span class="w">        </span><span class="p">}</span><span class="w"> </span><span class="k">else</span><span class="w"> </span><span class="p">{</span>
+<span class="w">            </span><span class="nx">target</span><span class="w"> </span><span class="o">&gt;&gt;=</span><span class="w"> </span><span class="mf">1</span><span class="p">;</span>
+<span class="w">        </span><span class="p">}</span>
+<span class="w">    </span><span class="p">}</span>
+<span class="w">    </span><span class="nx">ans</span><span class="w"> </span><span class="o">+=</span><span class="w"> </span><span class="nx">startValue</span><span class="w"> </span><span class="o">-</span><span class="w"> </span><span class="nx">target</span><span class="p">;</span>
+<span class="w">    </span><span class="k">return</span><span class="w"> </span><span class="nx">ans</span><span class="p">;</span>
+<span class="p">}</span>
+</code></pre></div></td></tr></table></div>
+</div>
 </div>
 </div>
 <!-- solution:end -->