题目：

题目链接： https://leetcode-cn.com/problems/shu-zu-zhong-shu-zi-chu-xian-de-ci-shu-lcof/

解题思路：
方法一：异或，时间O(N),空间O(1)
如果只有一个数字不重复，那只要从第一个数字异或到最后一个数字的结果，就是不重复的数字

但是如果有两个数字不重复，那异或的结果，就是两个不重复数字的异或结果

如果能够把两个数字分到两组，其他数字保证相同的数字分到一组，那对两组数字分别进行异或操作，最后就可以得到这两个不同的数字了
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版权声明：本文为CSDN博主「冰临天下」的原创文章，遵循CC 4.0 BY-SA版权协议，转载请附上原文出处链接及本声明。
原文链接：https://blog.csdn.net/songyuwen0808/article/details/105805547
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