public void pathsFrom(char start, char end)
{
int root = _graph.GetNodeIndex(start);
int destination = _graph.GetNodeIndex(end);
VertexQue route = new VertexQue();
BFSTraversal(root, route, destination);
Console.Write($" There are {route.Count()} trips from {start} to {end} with max 3 stops");
}
public void pathsWithMaxStops(char start, char end, int max_hops)
{
// graph index of start and end nodes
int root = _graph.GetNodeIndex(start);
int destination = _graph.GetNodeIndex(end);
VertexQue trips = new VertexQue();
DFSMax(root, trips, destination);
Console.WriteLine($"There are {trips.Count()} trips from {start} to {end} with exact 4 stops. ");
}