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小杨在整理班级口号。一个字符串由英文字母构成(大小写混合)。判断回文时通常忽略大小写:例如 AbBa 忽略大小写后是 abba,是回文串。
给定字符串 s,请回答三个问题:
1. 把所有字母..." />
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<meta property="og:description" content="题目描述
小杨在整理班级口号。一个字符串由英文字母构成(大小写混合)。判断回文时通常忽略大小写:例如 AbBa 忽略大小写后是 abba,是回文串。
给定字符串 s,请回答三个问题:
1. 把所有字母..." />
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#S0401P1. 小杨的回文串
</h1>
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<span class="problem__tag-item">ID: 6775</span>
<span class="problem__tag-item icon icon-book">传统题</span>
<span class="problem__tag-item icon icon-stopwatch">1000ms</span>
<span class="problem__tag-item icon icon-comparison">256MiB</span>
<a class="problem__tag-item interactive" href="/record?pid=6775">尝试: 1</a>
<a class="problem__tag-item interactive" href="/record?pid=6775&amp;status=1">已通过: 1</a>
<span class="problem__tag-item">难度: 10</span>
<span class="problem__tag-item interactive">上传者: <span class="user-profile-link">
<img class="small user-profile-avatar v-center" loading="lazy" src="//cravatar.cn/avatar/6d2c246e0e74c79036c564ac6e90f1f5?d=mm&amp;s=64" width="20" height="20">
<a class="user-profile-name uname--lv10" href="/user/531">
moss
</a>
</span>
</span>
<span name="show_tags" class="problem__tag-item interactive nojs--hide icon icon-tag">标签&gt;</span><span class="problem__tag-item tags hasjs--hide">字符串</span><span class="problem__tag-item tags hasjs--hide">回文</span><span class="problem__tag-item tags hasjs--hide">大小写转换</span> </ul>
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</div>
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<div class="section__header non-scratchpad--hide">
<h1 class="section__title">小杨的回文串</h1>
</div>
<div class="section__body typo richmedia" data-fragment-id="problem-description">
<h2 id="%E9%A2%98%E7%9B%AE%E6%8F%8F%E8%BF%B0" tabindex="-1">题目描述</h2>
<p>小杨在整理班级口号。一个字符串由<strong>英文字母</strong>构成(大小写混合)。判断回文时通常忽略大小写:例如 <code>AbBa</code> 忽略大小写后是 <code>abba</code>,是回文串。</p>
<p>给定字符串 <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi></mrow><annotation encoding="application/x-tex">s</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.4306em;"></span><span class="mord mathnormal">s</span></span></span></span>,请回答三个问题:</p>
<ol>
<li>把所有字母统一转成小写后,它是否为回文串(是输出 <code>Yes</code>,否输出 <code>No</code>);</li>
<li>原串中<strong>大写</strong>字母的个数;</li>
<li>原串中<strong>小写</strong>字母的个数。</li>
</ol>
<h2 id="%E8%BE%93%E5%85%A5%E6%A0%BC%E5%BC%8F" tabindex="-1">输入格式</h2>
<p>一行一个字符串 <span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mi>s</mi></mrow><annotation encoding="application/x-tex">s</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.4306em;"></span><span class="mord mathnormal">s</span></span></span></span>,仅由英文字母构成。</p>
<h2 id="%E8%BE%93%E5%87%BA%E6%A0%BC%E5%BC%8F" tabindex="-1">输出格式</h2>
<p>三行:<code>Yes</code>/<code>No</code>、大写字母个数、小写字母个数。</p>
<h2 id="%E6%95%B0%E6%8D%AE%E8%8C%83%E5%9B%B4" tabindex="-1">数据范围</h2>
<ul>
<li><span class="katex"><span class="katex-mathml"><math xmlns="http://www.w3.org/1998/Math/MathML"><semantics><mrow><mn>1</mn><mo>≤</mo><mi mathvariant="normal">∣</mi><mi>s</mi><mi mathvariant="normal">∣</mi><mo>≤</mo><mn>1000</mn></mrow><annotation encoding="application/x-tex">1 \le |s| \le 1000</annotation></semantics></math></span><span class="katex-html" aria-hidden="true"><span class="base"><span class="strut" style="height:0.7804em;vertical-align:-0.136em;"></span><span class="mord">1</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">≤</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:1em;vertical-align:-0.25em;"></span><span class="mord">∣</span><span class="mord mathnormal">s</span><span class="mord">∣</span><span class="mspace" style="margin-right:0.2778em;"></span><span class="mrel">≤</span><span class="mspace" style="margin-right:0.2778em;"></span></span><span class="base"><span class="strut" style="height:0.6444em;"></span><span class="mord">1000</span></span></span></span></li>
</ul>
<h2 id="%E6%A0%B7%E4%BE%8B-%231" tabindex="-1">样例 #1</h2>
<pre><code class="language-input1">AbBa
</code></pre>
<pre><code class="language-output1">Yes
2
2
</code></pre>
<h2 id="%E6%A0%B7%E4%BE%8B-%232" tabindex="-1">样例 #2</h2>
<pre><code class="language-input2">String
</code></pre>
<pre><code class="language-output2">No
1
5
</code></pre>
</div> </div></div>
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