public static FrogNode CreateFrogNodeTree(int numberOfFrogs)
{
FrogNode root = new FrogNode(numberOfFrogs);
root = FrogNode.CreateFrogPossibilities(root);
return(root);
}
static FrogNode CreateFrogPossibilities(FrogNode node)
{
if (node.ZeroPos - 1 >= 0 && node.Frogs[node.ZeroPos - 1] == '>')
{
FrogNode newNode = new FrogNode(node);
newNode.ZeroPos = node.ZeroPos - 1;
newNode.Frogs[node.ZeroPos] = '>';
newNode.Frogs[newNode.ZeroPos] = '_';
node.Nodes.Add(newNode);
}
if (node.ZeroPos - 2 >= 0 && node.Frogs[node.ZeroPos - 2] == '>')
{
FrogNode newNode = new FrogNode(node);
newNode.ZeroPos = node.ZeroPos - 2;
newNode.Frogs[node.ZeroPos] = '>';
newNode.Frogs[newNode.ZeroPos] = '_';
node.Nodes.Add(newNode);
}
if (node.ZeroPos + 1 < node.Frogs.Count && node.Frogs[node.ZeroPos + 1] == '<')
{
FrogNode newNode = new FrogNode(node);
newNode.ZeroPos = node.ZeroPos + 1;
newNode.Frogs[node.ZeroPos] = '<';
newNode.Frogs[newNode.ZeroPos] = '_';
node.Nodes.Add(newNode);
}
if (node.ZeroPos + 2 < node.Frogs.Count && node.Frogs[node.ZeroPos + 2] == '<')
{
FrogNode newNode = new FrogNode(node);
newNode.ZeroPos = node.ZeroPos + 2;
newNode.Frogs[node.ZeroPos] = '<';
newNode.Frogs[newNode.ZeroPos] = '_';
node.Nodes.Add(newNode);
}
foreach (FrogNode child in node.Nodes)
{
FrogNode.CreateFrogPossibilities(child);
}
return(node);
}