136. 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?

 

public int singleNumber(int[] nums) {
        int result = 0;
        for (int i : nums) {
            result ^= i;
        }
        return result;
}

  

posted @ 2017-07-31 19:52  apanda009  阅读(54)  评论(0编辑  收藏  举报