#include <stdio.h>

void calculateBonus(int yearsOfService) {
    if (yearsOfService >= 1 && yearsOfService <= 5) {
        printf("5%%\n");
    } else if (yearsOfService >= 6 && yearsOfService <= 10) {
        printf("10%%\n");
    } else if (yearsOfService > 10 && yearsOfservice <= 40) {
        printf("15%%\n");
    } else {
        printf("Invalid Input\n");
    }
}

int main() {
    int years;
    scanf("%d", &years);
    calculateBonus(years);
    return 0;
}