LeetCode: Single Number

简单题

class Solution {
public:
    int singleNumber(int A[], int n) {
        // IMPORTANT: Please reset any member data you declared, as
        // the same Solution instance will be reused for each test case.
        int ans = 0;
        for (int i = 0; i < n; i++) ans ^= A[i];
        return ans;
    }
};

 C#

public class Solution {
    public int SingleNumber(int[] nums) {
        int ans = 0;
        for (int i = 0; i < nums.Length; i++) ans ^= nums[i];
        return ans;
    }
}