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leetcode-problemset/leetcode-cn/problem (Chinese)/整理字符串 [make-the-string-great].html
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<p>给你一个由大小写英文字母组成的字符串 <code>s</code></p>
<p>一个整理好的字符串中,两个相邻字符 <code>s[i]</code><code>s[i+1]</code>,其中 <code>0<= i <= s.length-2</code> ,要满足如下条件:</p>
<ul>
<li><code>s[i]</code> 是小写字符,则 <code>s[i+1]</code> 不可以是相同的大写字符。</li>
<li><code>s[i]</code> 是大写字符,则 <code>s[i+1]</code> 不可以是相同的小写字符。</li>
</ul>
<p>请你将字符串整理好,每次你都可以从字符串中选出满足上述条件的 <strong>两个相邻</strong> 字符并删除,直到字符串整理好为止。</p>
<p>请返回整理好的 <strong>字符串</strong> 。题目保证在给出的约束条件下,测试样例对应的答案是唯一的。</p>
<p><strong>注意:</strong>空字符串也属于整理好的字符串,尽管其中没有任何字符。</p>
<p> </p>
<p><strong>示例 1</strong></p>
<pre>
<strong>输入:</strong>s = "leEeetcode"
<strong>输出:</strong>"leetcode"
<strong>解释:</strong>无论你第一次选的是 i = 1 还是 i = 2都会使 "leEeetcode" 缩减为 "leetcode" 。
</pre>
<p><strong>示例 2</strong></p>
<pre>
<strong>输入:</strong>s = "abBAcC"
<strong>输出:</strong>""
<strong>解释:</strong>存在多种不同情况,但所有的情况都会导致相同的结果。例如:
"abBAcC" --> "aAcC" --> "cC" --> ""
"abBAcC" --> "abBA" --> "aA" --> ""
</pre>
<p><strong>示例 3</strong></p>
<pre>
<strong>输入:</strong>s = "s"
<strong>输出:</strong>"s"
</pre>
<p> </p>
<p><strong>提示:</strong></p>
<ul>
<li><code>1 <= s.length <= 100</code></li>
<li><code>s</code> 只包含小写和大写英文字母</li>
</ul>