class DAG<T>
    {
        public IList<Vertex<T>> Vertices{get; set;}

        public DAG()
        {
            Vertices = new List<Vertex<T>>();
        }

        public void AddVertex(Vertex<T> v)
        {
            Vertices.Add(v);
        }
        // Cyclic Graf oluşturmayı engelle
        public bool TryAddEdge(Vertex<T> src, Vertex<T> dest)
        {
            if(dest.IsTraversePossible(src))
            {
                return false;
            }
            src.OutgoingVertices.Add(dest);
            dest.IncomingVertices.Add(src);
            return true;
        }
    }