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