Compilare: user.cpp: In function ‘void kosaraju_visit(int, std::vector<int>&)’: user.cpp:32:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size (); i++) ^ user.cpp: In function ‘void kosaraju_assign(int, int)’: user.cpp:44:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v_m[nod].size (); i++) { ^ user.cpp: In function ‘bool twosat()’: user.cpp:72:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < q.size (); i++) ^ user.cpp:89:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < comp_nodes[i].size (); j++) { ^