d060: 還要等多久啊？

import java.util.Scanner;
public class d060 {
public static void main(String[] args) {
Scanner in=new Scanner (System.in);
while(in.hasNext()){
int n = in.nextInt();
int time;
if(n>=0&&n<25){
time=25-n;

}else if(n>25&&n<60){
time=60-n+25;
}else time=0;
System.out.println(time);
}
}
}