Compilare: user.cpp: In function ‘void Print()’: user.cpp:41:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int index(0), a, b ; index < Cycle.size() ; ++index) ^ user.cpp:43:32: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index == Cycle.size() - 1) ^ user.cpp: In function ‘void DepthFirstSearch(int)’: user.cpp:113:50: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (index = 0 ; index < Multigraph[node].size() && Used[Multigraph[node][index].first] ; ++index) ^ user.cpp:115:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if (index == Multigraph[node].size()) ^