只出现一次的数字II（位运算/卡诺图）

题目：https://leetcode-cn.com/problems/single-number-ii/ 代码：https://leetcode-cn.com/problems/single-number-ii/solution/zhi-chu-xian-yi-ci-de-shu-zi-ii-shu-zi-dian-lu-she/

class Solution {
public:
    int singleNumber(vector& nums) {
        int one = 0, two = 0, temp = 0;
        for (int num : nums) {
            temp = (two & num) | (one & ~num);
            two = (~one & ~two & num) | (two & ~num);
            one = temp;
        }
        return one|two;
    }
};