Add new graph example

test/roditty_zwick_test.cc

@@ -0,0 +1,43 @@
+#include <doctest/doctest.h>
+
+#include "algorithm/decremental_scc.h"
+#include "algorithm/decremental_tc.h"
+
+using namespace graph;
+
+TEST_SUITE("Roditty and Zwick") {
+
+  TEST_CASE("Roditty Zwick A1 T1 ") {
+    // 1 --> 2 --> 5 --> 7 --> 2
+    // 1 --> 4 --> 3 --> 1
+    //       4 --> 6 --> 3
+    Digraph<std::uint16_t> G;
+    G.insert(1, 2);
+    G.insert(1, 4);
+    G.insert(2, 5);
+    G.insert(3, 1);
+    G.insert(4, 3);
+    G.insert(4, 6);
+    G.insert(5, 7);
+    G.insert(6, 3);
+    G.insert(7, 2);
+
+    algo::DecrementalSCC<std::uint16_t> rz(G);
+    rz.init();
+
+    std::vector<std::vector<std::uint16_t>> exp = {
+      {2, 5, 7},
+      {1, 3, 4, 6}
+    };
+
+    CHECK_EQ(rz.query(1, 2), false);
+    CHECK_EQ(rz.query(1, 3), true);
+    CHECK_EQ(rz.query(1, 7), false);
+    CHECK_EQ(rz.query(2, 3), false);
+    CHECK_EQ(rz.query(2, 5), true);
+    CHECK_EQ(rz.query(5, 7), true);
+
+    //CHECK_EQ(rz.query(1, 2), true);
+  }
+
+}