Index: lib/graph/scc.cpp
==================================================================
--- lib/graph/scc.cpp
+++ lib/graph/scc.cpp
@@ -44,10 +44,11 @@
 	}
 
 	void scc()
 	{
 		int N = G.size();
+		no = 0; // whatever small enough
 		dfs_no.assign(N, 0);
 		dfs_lo.assign(N, 0);
 		pending = stack<int>();
 		scc_id.assign(N, -1);
 		scc_list.clear();