using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace PointinFigure
{
    class PointinFigure
    {
        static void Main(string[] args)
        {
            var h = int.Parse(Console.ReadLine());
            var x = int.Parse(Console.ReadLine());
            var y = int.Parse(Console.ReadLine());

            var Inside =  (x > 0 && x < (3 * h) && y > 0 && y < h) || (x > h && x < (2 * h) && y > h && y < (4 * h));
            var Outside =  (x < 0 || x > (3 * h) && y < 0 || y > h) || (x < h || x > (2 * h) && y < h || y > (4 * h));
            var border = (x == 0 || y == 0) || (x == h) || (y == h && x <= 0 || x >= 3 * h) || (y == 4 * h && x >= h || x <= 2 * h) || (x == h && y >= h || y <= 4 * h) || (x == 2 * h && y >= h || y <= 4 * h);

            if (y != 0 && Inside)
            {
                Console.WriteLine("inside");
            }
            else if (y != 0 && Outside)
            {
                Console.WriteLine("outside");
            }
            else if (border)
            {
                Console.WriteLine("border");
            }
        }
    }
}