#include <stdio.h>
int main(){
    int year;
    scanf("%d",&year);
    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;
}