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