#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; 
}