1156: 交换值

Memory Limit:128 MB Time Limit:1.000 S
Judge Style:Text Compare Creator:
Submit:24 Solved:14

Description

输入整数a,b,将a和b中的值交换并输出

Input

一行两个数a和b

Output

两个数交换后的a和b

Sample Input Copy

15 20

Sample Output Copy

20 15