#include <stdio.h>
int main() {
    int years;
    scanf("%d", &years);
    if (years >= 1 && years <= 5) {
        printf("5%%");
    }
    else if (years >= 6 && years <= 10) {
        printf("10%%");
    } else if (years)> 10 && years <= 40) {
        printf("15%%");
    }else {
        printf("Invaild Input");
        
    }
    return 0;
    }