#include<stdio.h>
int main()
{
    int year;
    scanf("%d",&year);
    if(year<1)
    printf("Invalid Input");
    else if(year>=1&&year<=5)
    printf("5%%");
    else if(year>=6&&year<=10)
    printf("10%%");
    else(year>10)
    printf("15%%");
    return 0;
}