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36 lines
1.2 KiB
HTML
36 lines
1.2 KiB
HTML
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<p>给你一个整数数组 <code>nums</code> ，除某个元素仅出现 <strong>一次</strong> 外，其余每个元素都恰出现 <strong>三次 。</strong>请你找出并返回那个只出现了一次的元素。</p>
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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>nums = [2,2,3,2]
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<strong>输出：</strong>3
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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>nums = [0,1,0,1,0,1,100]
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<strong>输出：</strong>100
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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 <= nums.length <= 3 * 10<sup>4</sup></code></li>
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<li><code>-2<sup>31</sup> <= nums[i] <= 2<sup>31</sup> - 1</code></li>
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<li><code>nums</code> 中，除某个元素仅出现 <strong>一次</strong> 外，其余每个元素都恰出现 <strong>三次</strong></li>
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</ul>
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<p> </p>
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<p><strong>进阶：</strong>你的算法应该具有线性时间复杂度。 你可以不使用额外空间来实现吗？</p>
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<p> </p>
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<p><meta charset="UTF-8" />注意：本题与主站 137 题相同：<a href="https://leetcode-cn.com/problems/single-number-ii/">https://leetcode-cn.com/problems/single-number-ii/</a></p>
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