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Problem1492--2.12-11:变量交换

1492: 2.12-11:变量交换

Time Limit: 1 Sec  Memory Limit: 128 MB  Submit: 0  Solved: 15
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Description

给定两个数 a 和 b，用异或运算交换它们的值

Input

一行两个非负整数m和n

Output

一行两个非负整数n和m

Sample Input Copy 

21 22

Sample Output Copy 

22 21

HINT

0 <= m <= 2^31-1
0 <= n <= 2^31-1

Source/Category

算法 位运算 
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