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