using System;

class PointInFigure
{
    static void Main()
    {
        int h = int.Parse(Console.ReadLine());
        int x = int.Parse(Console.ReadLine());
        int y = int.Parse(Console.ReadLine());

        var outside1 = (x < 0) || (x > 3 * h) || (y < 0) || (y > h);
        var outside2 = (x < h) || (x > 2 * h) || (y < h) || (y > 4 * h);
        var inside1 = (x > 0) && (x < 3 * h) && (y > 0) && (y < h);
        var inside2 = (x > h) && (x < 2 * h) && (y > h) && (y < 4 * h);
        var common = (x > h) && (x < 2 * h) && (y == h);

        if (outside1 && outside2)
            Console.WriteLine("outside");
        else if (inside1 || inside2 || common)
            Console.WriteLine("inside");
        else
            Console.WriteLine("border");
    }
}