DirectedDepthFirstSearch

This application Demonstrates a depth first search algorithm in a directed graph as described in the book "Algorithms" by Robert Sedgewick and Kevin Wayne. To add a vertex to the graph, tap on the screen. To add an edge to the graph, tap on the start vertex, and then tap on the end vertex. To determine whether a path exists between two vertices, long press on the start vertex, and then long press on the end vertex.