Fix generating digraphs

Author: baatochan

DirectedGraph.cpp

@@ -39,9 +39,9 @@ void DirectedGraph::generate(int numberOfVertices, int density) {
 	// declare rands
 	std::random_device rd;
 	std::mt19937 mt(rd());
-	std::uniform_int_distribution<int> randomVertex(0, numberOfVertices);
-	std::uniform_int_distribution<int> randomEdge(0, numberOfEdges);
-	std::uniform_int_distribution<int> randomValue(INT32_MIN, INT32_MAX);
+	std::uniform_int_distribution<int> randomVertex(0, numberOfVertices - 1);
+	std::uniform_int_distribution<int> randomEdge(0, numberOfEdges - 1);
+	std::uniform_int_distribution<int> randomValue(0, INT32_MAX);
 
 	int beginningVertex = 0;
 	int endVertex = 0;