public void Execute(Node[] nodes, Edge[] edges)
{
var colors = Enumerable.Range(0, nodes.Length).ToArray();
var sortedNodes = nodes.Where(n => !n.ColorId.HasValue).OrderByDescending(n => n.EdgeCount).ThenByDescending(n => n.UnavailableCount);
do
{
var node = sortedNodes.First();
//Console.Write("select node {0} with edge count {1} and unavaiable count {2}", node.Id, node.EdgeCount, node.UnavailableCount);
foreach (var color in colors)
{
if (node.CanAssignColor(color))
{
//Console.WriteLine("...assigned color {0}", color);
node.AssignColor(color);
break;
}
}
sortedNodes = nodes.Where(n => !n.ColorId.HasValue).OrderByDescending(n => n.EdgeCount).ThenByDescending(n => n.UnavailableCount);
} while (sortedNodes.Any());
var usedColors = nodes.Select(n => n.ColorId).Distinct().ToArray();
int origCount;
do
{
origCount = usedColors.Length;
foreach (var color in usedColors)
{
var nodesWithColor = nodes.Where(n => n.ColorId == color).ToArray();
foreach (var node in nodesWithColor)
{
foreach (var color2 in usedColors.Where(u => u != color).ToArray())
{
if (color2 != node.ColorId && node.CanAssignColor(color2.Value))
{
node.ColorId = color2;
break;
}
}
}
}
usedColors = nodes.Select(n => n.ColorId).Distinct().ToArray();
} while (usedColors.Length < origCount);
}
public void Execute(Node[] nodes, Edge[] edges)
{
var colors = Enumerable.Range(0, nodes.Length).ToArray();
var sortedNodes = nodes.OrderByDescending(n => n.EdgeCount).ToArray();
foreach (var node in sortedNodes)
{
foreach (var color in colors)
{
if (node.CanAssignColor(color))
{
node.ColorId = color;
break;
}
}
}
}