#include<stdio.h>
int main()
{
    int years;
    scanf("%d",&years);
    if(years>0&&years<6);
    {
        printf("\n5%");
    }
    else if(years>5&&years<11)
    {
        printf("\n10%");
    }
    else if(years<10)
    {
        printf("\n15%");
    }
    else
    {
        printf("\nInavalid Input");
    }
    return 0;
}