final commit

Greedy.cs

@@ -10,7 +10,7 @@ public class Greedy : Pathfinder {
     private PriorityQueue           frontier;
     private Dictionary<Node, Node>  previous;
     private Dictionary<Node, int>   cost;
-    private Dictionary<Node, Node>  visitedFrom;
+    private Dictionary<Node, int>   visitedFrom;
    
    public void SetGraph(Graph g) {
       graph = g;
@@ -54,9 +54,9 @@ public class Greedy : Pathfinder {
        bool found = false;
        Node start;
        
-       visitedFrom = new Dictionary<Node, Node>();
+       visitedFrom = new Dictionary<Node, int>();
        frontier.Enqueue(start, 0);
-       visitedFrom[start];
+       visitedFrom[start] = -1;
        
        while(frontier.Count > 0){
            Node current = frontier.Dequeue();