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