Leetcode 136 Single Number(水)
解題思路:求所有數的亦或和。
class Solution {
public:
int singleNumber(vector<int>& nums) {
sort(nums.begin(), nums.end());
int ans = 0;
for (int i = 0; i < nums.size(); i++) ans ^= nums[i];
return ans;
}
};
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