{ "data": { "question": { "questionId": "137", "questionFrontendId": "137", "boundTopicId": null, "title": "Single Number II", "titleSlug": "single-number-ii", "content": "

Given an integer array nums where every element appears three times except for one, which appears exactly once. Find the single element and return it.

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You must implement a solution with a linear runtime complexity and use only constant extra space.

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Example 1:

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Input: nums = [2,2,3,2]\nOutput: 3\n

Example 2:

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Input: nums = [0,1,0,1,0,1,99]\nOutput: 99\n
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Constraints:

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Python 2.7.12.

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C# 10 with .NET 6 runtime

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