private static void Main(string[] args)
{
if (args.Count() == 1)
{
string filePath = args[0];
var vertices = new List<Vertex>();
using (var reader = new StreamReader(filePath))
{
while (!reader.EndOfStream)
{
var verticeArray = reader.ReadLine().Split(new[] {' ', '\t'}, StringSplitOptions.RemoveEmptyEntries);
vertices.Add(new Vertex(int.Parse(verticeArray[0]),
verticeArray.Skip(1).Select(int.Parse).ToArray()));
}
}
vertices.Sort();
var stopWatch = new Stopwatch();
//var repeatCount = (int)(Math.Pow(vertices.Count, 2)*Math.Log(vertices.Count, Math.E));
var repeatCount = (int)(Math.Pow(vertices.Count, 2));
stopWatch.Start();
var kargerAlg = new KargerMinCut(vertices.ToArray());
var minCut = Enumerable.Range(1, repeatCount)
.Select(i => kargerAlg.CalculateMinCut())
.Min();
stopWatch.Stop();
Console.WriteLine("min cut={0}, repeatCount = {1}, running time = {2} ms", minCut, repeatCount, stopWatch.ElapsedMilliseconds);
Console.WriteLine("press any key");
Console.ReadLine();
}
}
public void FourVertices()
{
var vertices = new Vertex[]
{
new Vertex(1, new [] {2, 4, 3}),
new Vertex(2, new [] {1, 3}),
new Vertex(3, new [] {1, 2}),
new Vertex(4, new [] {1})
};
var alg = new KargerMinCut(vertices);
var minCut = Enumerable.Range(1, 32).Select(i => alg.CalculateMinCut()).Min();
Assert.AreEqual(1, minCut);
}
public void EigthVertices()
{
var vertices = new Vertex[]
{
new Vertex(1, new [] {5, 2, 6}),
new Vertex(2, new [] {1, 5, 6, 3}),
new Vertex(3, new [] {2, 7, 4, 8}),
new Vertex(4, new [] {3, 7, 8}),
new Vertex(5, new [] {1, 2, 6}),
new Vertex(6, new [] {1, 2, 5, 7}),
new Vertex(7, new [] {6, 3, 4, 8}),
new Vertex(8, new [] {3, 4, 7}),
};
var alg = new KargerMinCut(vertices);
var minCut = Enumerable.Range(1, 200).Select(i => alg.CalculateMinCut()).Min();
Assert.AreEqual(2, minCut);
}