// Triangles.cs, by Josh Moyer <JMoyer@NODOMAIN.NET>
//
// Spec:
// Write a function that receives three integer inputs for the lengths of
// the sides of a triangle and returns one of four values to determine the
// triangle type (1=scalene, 2=isosceles, 3=equilateral, 4=error). Generate
// test cases for the function assuming another developer coded the function

using System;

namespace Triangles
{
	class Triangles
	{
		static void Main(string[] args)
		{
			ushort result;
			
			ushort[,] testcases = new ushort[,]
			{
				{4,0,1,1},
				{4,1,0,1},
				{4,1,1,0},
				{4,0,65535,65535},
				{4,65535,0,65535},
				{4,65535,65535,0},

				{3,1,1,1},
				{3,65535,65535,65535},

				{2,1,1,65535},
				{2,1,65535,1},
				{2,65535,1,1},
				{2,65535,65535,1},
				{2,65535,1,65535},
				{2,1,65535,65535},
				
				{1,1,32767,65535},
				{1,32767,65535,1},
				{1,65535,1,32767},
				{1,1,65535,32767},
				{1,65535,32767,1},
				{1,32767,1,65535}
			};
			
			for (ushort i=0; i<testcases.Length/4 ; i++)
			{
				result = TriangleType(testcases[i,1], testcases[i,2], testcases[i,3]);
				if (result != testcases[i,0]) throw new Exception();
			}
			Console.WriteLine("Tests complete.");
		}
		
		public static ushort TriangleType(ushort side1, ushort side2, ushort side3)
		{
			//if (side1 == null || side2 == null || side3 == null) return 4;
			if (side1 == 0 || side2 == 0 || side3 == 0) return 4;
			if (side1 == side2 && side2 == side3 && side3 == side1) return 3;
			if (side1 == side2 || side2 == side3 || side3 == side1) return 2;
			return 1;
		}
	}
}