#include <stdio.h>
int main ()
{
    int years;
    scanf("%d",&years);
    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;
    
}