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40 lines
1.1 KiB
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40 lines
1.1 KiB
HTML
<p>给你一个长度为 <code>n</code> 的 <strong>整数</strong> 数组 <code>pref</code> 。找出并返回满足下述条件且长度为 <code>n</code> 的数组<em> </em><code>arr</code> ：</p>
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<ul>
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<li><code>pref[i] = arr[0] ^ arr[1] ^ ... ^ arr[i]</code>.</li>
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</ul>
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<p>注意 <code>^</code> 表示 <strong>按位异或</strong>（bitwise-xor）运算。</p>
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<p>可以证明答案是 <strong>唯一</strong> 的。</p>
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<p> </p>
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<p><strong>示例 1：</strong></p>
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<pre><strong>输入：</strong>pref = [5,2,0,3,1]
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<strong>输出：</strong>[5,7,2,3,2]
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<strong>解释：</strong>从数组 [5,7,2,3,2] 可以得到如下结果：
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- pref[0] = 5
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- pref[1] = 5 ^ 7 = 2
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- pref[2] = 5 ^ 7 ^ 2 = 0
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- pref[3] = 5 ^ 7 ^ 2 ^ 3 = 3
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- pref[4] = 5 ^ 7 ^ 2 ^ 3 ^ 2 = 1
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</pre>
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<p><strong>示例 2：</strong></p>
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<pre><strong>输入：</strong>pref = [13]
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<strong>输出：</strong>[13]
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<strong>解释：</strong>pref[0] = arr[0] = 13
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</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 <= pref.length <= 10<sup>5</sup></code></li>
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<li><code>0 <= pref[i] <= 10<sup>6</sup></code></li>
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</ul>
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