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