public static bool ExistsPathOPT2(Graph<int> graph, int start, int destination)
{
var nodes = graph.Nodes;
foreach (var node in nodes)
{
node.NodeState = State.Unvisted;
}
var discovered = new Stack<Node<int>>();
var currentNode = graph.FindNode(start);
currentNode.NodeState = State.Visited;
discovered.Push(currentNode);
while (discovered.Count > 0)
{
currentNode = discovered.Pop();
foreach (var node in currentNode.Neighbors)
{
if (node.NodeState.Equals(State.Unvisted))
{
node.NodeState = State.Visited;
if (node.Value.Equals(destination)) return true;
discovered.Push(node);
}
}
}
return false;
}