#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;
}