Description

Jingjing wants to call Beibei again, but this time he faces another problem. Jingjing doesn't want to disturb Beibei during class, nor does he want to call her just as she is about to go to class. Therefore, he decides to call her exactly at the 25th minute. Given the current minute of the time, please help him calculate how many more minutes he needs to wait before he can call Beibei.

Input Format

A single line containing the current minute $m$ ($0 \leq m \leq 59$).

Output Format

Output the number of minutes Jingjing needs to wait before he can call.

Sample

20

5