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54 lines
1.1 KiB
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54 lines
1.1 KiB
HTML
<p>给定一个只包括 <code>'('</code>，<code>')'</code>，<code>'{'</code>，<code>'}'</code>，<code>'['</code>，<code>']'</code> 的字符串 <code>s</code> ，判断字符串是否有效。</p>
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<p>有效字符串需满足：</p>
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<ol>
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<li>左括号必须用相同类型的右括号闭合。</li>
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<li>左括号必须以正确的顺序闭合。</li>
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</ol>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre>
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<strong>输入：</strong>s = "()"
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<strong>输出：</strong>true
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre>
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<strong>输入：</strong>s = "()[]{}"
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<strong>输出：</strong>true
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</pre>
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<p><strong>示例 3：</strong></p>
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<pre>
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<strong>输入：</strong>s = "(]"
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<strong>输出：</strong>false
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</pre>
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<p><strong>示例 4：</strong></p>
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<pre>
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<strong>输入：</strong>s = "([)]"
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<strong>输出：</strong>false
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</pre>
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<p><strong>示例 5：</strong></p>
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<pre>
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<strong>输入：</strong>s = "{[]}"
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<strong>输出：</strong>true</pre>
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<p> </p>
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<p><strong>提示：</strong></p>
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<ul>
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<li><code>1 <= s.length <= 10<sup>4</sup></code></li>
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<li><code>s</code> 仅由括号 <code>'()[]{}'</code> 组成</li>
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</ul>
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