Add virtual class for the dynamic reachability algorithms

algorithm/dynamic_reachability.h

@@ -0,0 +1,38 @@
+#ifndef DYNAMIC_REACHABILITY_
+#define DYNAMIC_REACHABILITY_
+
+#include "graph/digraph.h"
+#include "graph/scc.h"
+#include "algorithm/tarjan.h"
+#include "algorithm/bfs.h"
+#include "algorithm/roditty_zwick.h"
+
+using namespace graph;
+
+namespace algo {
+
+template<typename T>
+class DynamicReachability : public RodittyZwick {
+  ~DynamicReachability();
+
+  //
+  virtual void init() =0;
+
+  //
+  virtual bool query(const T& u, const T& v) =0;
+
+  //
+  virtual void remove(const T& u, const T& v) =0;
+
+  //
+  virtual void insert() =0;
+};
+
+template<typename T>
+inline DynamicReachability<T>::~DynamicReachability() {
+
+}
+
+} // namespace algo
+
+#endif