Compilare: user.cpp: In function ‘bool Bfs()’: user.cpp:28:45: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < Graph[Node].size(); i++) ^ user.cpp:17:9: warning: unused variable ‘i’ [-Wunused-variable] int i, Node; ^ user.cpp: In function ‘void Solve()’: user.cpp:53:48: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(i = 0; i < Graph[Destination].size(); i++) ^