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