Compilare: user.cpp: In member function ‘void BiconnectedGraph::UnionFind::init(int)’: user.cpp:153:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:238:7: note: in expansion of macro ‘re’ re (i, n) p.pb(i); ^ user.cpp: In member function ‘void BiconnectedGraph::getByEdges()’: user.cpp:153:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:277:5: note: in expansion of macro ‘re’ re (i, N) ^ user.cpp:153:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:284:5: note: in expansion of macro ‘re’ re (i, N) comp_edge.pb(uf.gp(i)); ^ user.cpp: In member function ‘void BiconnectedGraph::getByVertices()’: user.cpp:153:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:299:5: note: in expansion of macro ‘re’ re (i, N) visited[i] = false; ^ user.cpp:153:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:302:5: note: in expansion of macro ‘re’ re (x, N) ^ user.cpp: In function ‘int main()’: user.cpp:153:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:349:3: note: in expansion of macro ‘re’ re (i, G.comp_vertex.size()) { ^ user.cpp:153:46: warning: unused variable ‘_NN’ [-Wunused-variable] #define re(II, NN) for (int II(0), _NN(NN); (II) < (NN); ++(II)) ^ user.cpp:349:3: note: in expansion of macro ‘re’ re (i, G.comp_vertex.size()) { ^