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算法题/add-binary.html
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算法题/add-binary.html
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<p>Given two binary strings <code>a</code> and <code>b</code>, return <em>their sum as a binary string</em>.</p>
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<p> </p>
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<p><strong>Example 1:</strong></p>
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<pre><strong>Input:</strong> a = "11", b = "1"
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<strong>Output:</strong> "100"
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</pre><p><strong>Example 2:</strong></p>
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<pre><strong>Input:</strong> a = "1010", b = "1011"
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<strong>Output:</strong> "10101"
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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 <= a.length, b.length <= 10<sup>4</sup></code></li>
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<li><code>a</code> and <code>b</code> consist only of <code>'0'</code> or <code>'1'</code> characters.</li>
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<li>Each string does not contain leading zeros except for the zero itself.</li>
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</ul>
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