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