Leetcode 136 Single Number
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Leetcode 136 Single Number
#include <vector>using namespace std;class Solution {public: int singleNumber(vector<int>& nums) { //异或操作,相同元素异或为0,a^b = b^a,a^0 = a; int single = 0; for (int i = 0; i < nums.size(); i++){ single ^= nums[i]; } //for(auto a : nums) single ^= a;//c++11新特性 return single; }};
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