136J. Single Number

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

本题最有价值的方法是实现了位运算。 详见本题解答部分解法4.

Method Best: 位运算

class Solution {
    public int singleNumber(int[] nums) {
        int a = 0;
        for(int n : nums){
            a = a^n;
        }
        return a;
    }
}

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