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solutions/136.Single_Number/readme.md

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## 136. Single Number (Medium)
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### **链接**
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题目:https://leetcode.com/problems/single-number/
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代码(github):https://github.com/illuz/leetcode
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### **题意**
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一个整数数组中只有一个数出现了一次,其它都出现了两次,要你找出这个数。
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### **分析**
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很经典的面试题,二进制异或的经典应用。
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了解了异或的性质后就知道为什么所有数异或一遍这个数就能出来。

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