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