136.Single-Number.md

136. Single Number

Difficulty: Hard

URL

https://leetcode.com/problems/single-number/submissions/

Solution

Approach 1: Bit Manipulation

The code is shown below:

class Solution:
    def singleNumber(self, nums: List[int]) -> int:
        res = 0
        for num in nums:
            res ^= num
        return res