LeetCode OJ——Single Number
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Single Number
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?
class Solution {public: int singleNumber(int A[], int n) { // Note: The Solution object is instantiated only once and is reused by each test case. int res=0; int i; for(i=0;i<n;i++) { res=res^A[i]; } return res; }};- LeetCode OJ——Single Number
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