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