Change project structure

graph/dag.h

@@ -0,0 +1,17 @@
+#ifndef DAG_H_
+#define DAG_H_
+
+#include "digraph.h"
+
+namespace graph {
+
+// Directed Acyclic Graph
+template<typename T>
+class DAG {
+public:
+  DAG() = default;
+};
+
+} // namespace graph
+
+#endif

graph/transitive_closure.h

@@ -0,0 +1,18 @@
+#ifndef TRANSITIVE_CLOSURE_H_
+#define TRANSITIVE_CLOSURE_H_
+
+#include "digraph.h"
+
+namespace graph {
+
+// Transitive closure matrix class to answer reachability queries
+template<typename T>
+class TransitiveClosure {
+public:
+  TransitiveClosure() = default;
+};
+
+} // namespace graph
+
+
+#endif