Given an array of integers, every element appears twice except for one. Find that single one.
Note: Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?
C++
class Solution { public: int singleNumber(int A[], int n) { int res = 0; for (int i =0; i<n;i++){ res ^= A[i]; } return res; } };
转载于:https://www.cnblogs.com/vercont/p/10210252.html
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