Add decremental maintenance of SCCs frame

graph/graph.h

@@ -20,6 +20,9 @@ public:
   // Add edge between v and u
   void insert(const T& v, const T& u);
 
+  // Reverse graph directions
+  Graph<T> reverse();
+
   // Adjacency matrix representation
   std::set<T> vertices;
   std::map<T, std::set<T>> adjMatrix;
@@ -37,6 +40,11 @@ void Graph<T>::insert(const T& v, const T& u) {
   adjMatrix[v].insert(u);
 }
 
+template<typename T>
+Graph<T> Graph<T>::reverse() {
+  return Graph<T>();
+}
+
 } // namespace graph
 
 #endif