#include<stdio.h>
int main() {
    int years;
    scanf("%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 (year > 10) {
        printf)("15%%\n");
    }
    return 0;
}