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