Compilare: user.cpp: In function ‘void Print()’: user.cpp:61:46: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int index(0) ; index < Cycle.size() - 1 ; ++index) ^ user.cpp: In function ‘void DepthFirstSearch(int)’: user.cpp:139:65: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (index = Last_index[node] ; index < Multigraph[node].size() && Used[Multigraph[node][index].first] ; ++index) ^ user.cpp:141:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index >= Multigraph[node].size()) ^