Problem H: 时间问题--倒计时

Problem H: 时间问题--倒计时

Time Limit: 1 Sec  Memory Limit: 128 MB
Submit: 49  Solved: 36
[Status] [Submit] [Creator:]

Description

做一个n秒倒计时 (0<n<=60)

Input

一个秒数n

Output

以分秒的形式的倒计时

Sample Input Copy

60

Sample Output Copy

01:00
00:59
00:58
...
00:00

HINT