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Update 0136-Single-Number.md
添加C、C++、Java、python代码实现
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![](../Animation/136.gif)
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### 代码实现
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#### C
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````c
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int singleNumber(int* nums, int numsSize){
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int res=0;
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for(int i=0;i<numsSize;i++)
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{
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res ^= nums[i];
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}
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return res;
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}
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````
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#### C++
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````c++
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class Solution {
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public:
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int singleNumber(vector<int>& nums) {
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int res=0;
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for(auto n:nums)
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{
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// 异或
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res ^= n;
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}
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return res;
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}
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};
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````
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#### Java
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````java
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class Solution {
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public int singleNumber(int[] nums) {
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int res = 0;
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for(int n:nums)
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{
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// 异或
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res ^= n;
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}
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return res;
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}
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}
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````
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#### pyton
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````python
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class Solution(object):
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def singleNumber(self, nums):
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return reduce(lambda x,y:x^y, nums)
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# reduce用法举例
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# 计算列表和:1+2+3+4+5
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# 使用 lambda 匿名函数
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# reduce(lambda x, y: x+y, [1,2,3,4,5])
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````
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### 进阶版
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有一个 n 个元素的数组,除了两个数只出现一次外,其余元素都出现两次,让你找出这两个只出现一次的数分别是几,要求时间复杂度为 O(n) 且再开辟的内存空间固定(与 n 无关)。
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