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40 lines
1.1 KiB
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40 lines
1.1 KiB
HTML
<p>Given a string <code>s</code> containing just the characters <code>'('</code>, <code>')'</code>, <code>'{'</code>, <code>'}'</code>, <code>'['</code> and <code>']'</code>, determine if the input string is valid.</p>
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<p>An input string is valid if:</p>
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<ol>
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<li>Open brackets must be closed by the same type of brackets.</li>
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<li>Open brackets must be closed in the correct order.</li>
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<li>Every close bracket has a corresponding open bracket of the same type.</li>
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</ol>
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<p> </p>
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<p><strong class="example">Example 1:</strong></p>
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<pre>
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<strong>Input:</strong> s = "()"
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<strong>Output:</strong> true
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</pre>
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<p><strong class="example">Example 2:</strong></p>
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<pre>
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<strong>Input:</strong> s = "()[]{}"
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<strong>Output:</strong> true
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</pre>
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<p><strong class="example">Example 3:</strong></p>
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<pre>
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<strong>Input:</strong> s = "(]"
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<strong>Output:</strong> false
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</pre>
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<p> </p>
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<p><strong>Constraints:</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> consists of parentheses only <code>'()[]{}'</code>.</li>
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</ul>
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