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