// editor3
#include <stdio.h>
int main()
{
    int years;
    scanf("%d",&year);
    if(year<1)
    {
        printf("5%");
        
    }
    else if(year>=1&&year=<5)
    {
        printf("10%");
    }
    else if(year=>6&&year<=10)
    {
        printf("15%");
    }
    else 
    {
        printf("Invalid Input");
    }
    return 0;
    
}