public void GreedySimple()
{
var vertices = Generator.VerticesInIdRange(0, 6);
var graph = new MutableGraph();
graph.Vertices.AddRange(vertices);
graph.ConnectAll(vertices[0], vertices[3]);
graph.ConnectAll(vertices[0], vertices[4]);
graph.ConnectAll(vertices[0], vertices[5]);
graph.ConnectAll(vertices[1], vertices[3]);
graph.ConnectAll(vertices[1], vertices[4]);
graph.ConnectAll(vertices[1], vertices[5]);
graph.ConnectAll(vertices[2], vertices[3]);
graph.ConnectAll(vertices[2], vertices[4]);
graph.ConnectAll(vertices[2], vertices[5]);
var coloring = graph.ToImmutable().ColorGreedily();
Assert.Equal(1, coloring[0]);
Assert.Equal(1, coloring[1]);
Assert.Equal(1, coloring[2]);
Assert.Equal(2, coloring[3]);
Assert.Equal(2, coloring[4]);
Assert.Equal(2, coloring[5]);
}
public void ColoringOptimization()
{
var vertices = Generator.VerticesInIdRange(0, 3);
var graph = new MutableGraph();
graph.Vertices.AddRange(vertices);
graph.ConnectAll(vertices[0], vertices[1]);
graph.ConnectAll(vertices[0], vertices[2]);
var coloring = graph.ToImmutable().ColorGreedily();
var originalCost = coloring.SummaryCost;
var optimizedColoring = coloring.OptimizeByWeighting();
var optimizedCost = optimizedColoring.SummaryCost;
Assert.Equal(5, originalCost);
Assert.Equal(4, optimizedCost);
}