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