// editor3
#include<stdio.h>
int main()
{
    int year;
    scanf("%d",&years);
    if(years < 1){
        printf("Invalid Input");
    }
    else if(years >=1 &&years<=5){
        printf("5%%");
    }
    else if(years >=6 &&years<=10){
        printf("10%%");
    }
    else if(years >10){
        printf("15%%");
    }
    return 0;
}