Single Number

作者: 文刀Hang | 来源:发表于2017-08-29 22:56 被阅读0次

Given an array of integers, every element appearstwiceexcept for one. Find that single one.

Note:

Your algorithm should have a linear runtime complexity. Could you implement it without using extra memory?

Answer:

class Solution(object):

def singleNumber(self, nums):

result = 0

for num in nums:

result ^= num#异或运算

return result

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Single Number