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