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2017校招-网易：数字翻转.html
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<h3 id="题目描述"><a href="#题目描述" class="headerlink" title="题目描述"></a>题目描述</h3><p>对于一个整数X，定义操作rev(X)为将X按数位翻转过来，并且去除掉前导0。例如:<br>如果 X = 123，则rev(X) = 321;<br>如果 X = 100，则rev(X) = 1.<br>现在给出整数x和y,要求rev(rev(x) + rev(y))为多少？</p>
<h4 id="输入描述："><a href="#输入描述：" class="headerlink" title="输入描述："></a>输入描述：</h4><blockquote>
<p>输入为一行，x、y(1 ≤ x、y ≤ 1000)，以空格隔开。</p>
</blockquote>
<h4 id="输出描述："><a href="#输出描述：" class="headerlink" title="输出描述："></a>输出描述：</h4><blockquote>
<p>输出rev(rev(x) + rev(y))的值</p>
</blockquote>
<a id="more"></a>
<h4 id="示例1"><a href="#示例1" class="headerlink" title="示例1"></a>示例1</h4><blockquote>
<p>输入<br>123 100<br>输出<br>223</p>
</blockquote>
<h3 id="解题代码"><a href="#解题代码" class="headerlink" title="解题代码"></a>解题代码</h3><figure class="highlight java"><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><td class="code"><pre><span class="line"><span class="keyword">import</span> java.util.*;</span><br><span class="line"></span><br><span class="line"><span class="keyword">public</span> <span class="class"><span class="keyword">class</span> <span class="title">Main</span> </span>{</span><br><span class="line"> <span class="function"><span class="keyword">public</span> <span class="keyword">static</span> <span class="keyword">void</span> <span class="title">main</span><span class="params">(String[] args)</span> </span>{</span><br><span class="line"> Scanner sc = <span class="keyword">new</span> Scanner(System.in);</span><br><span class="line"> <span class="keyword">int</span> x = sc.nextInt();</span><br><span class="line"> <span class="keyword">int</span> y = sc.nextInt();</span><br><span class="line"> System.out.println(rev(rev(x) + rev(y)));</span><br><span class="line"> }</span><br><span class="line"> </span><br><span class="line"> <span class="function"><span class="keyword">private</span> <span class="keyword">static</span> <span class="keyword">int</span> <span class="title">rev</span><span class="params">(<span class="keyword">int</span> num)</span> </span>{</span><br><span class="line"> <span class="keyword">int</span> ans = <span class="number">0</span>;</span><br><span class="line"> <span class="keyword">while</span> (num != <span class="number">0</span>) {</span><br><span class="line"> ans = ans * <span class="number">10</span> + num % <span class="number">10</span>;</span><br><span class="line"> num /= <span class="number">10</span>;</span><br><span class="line"> }</span><br><span class="line"> <span class="keyword">return</span> ans;</span><br><span class="line"> }</span><br><span class="line">}</span><br></pre></td></tr></table></figure>
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