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Hunan Normal University
College of Information Science and Engineering
交换两个数的值
Time Limit: 1000ms, Special Time Limit:2500ms, Memory Limit:32768KB
Total submit users: 456, Accepted users: 438
Problem 10465 : No special judgement
Problem description
  定义交换函数swap,用于交换两个数的值。

Input
  输入包含多组测试数据。 每组数据占一行,包含二个整数m,n,m,n用空格。

Output
  对于每组测试数据,输出交换后的结果,换行。

Sample Input
15 43
25 78
Sample Output
43 15
78 25
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