Compilare: user.cpp: In function ‘bool bfs()’: user.cpp:53:37: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[curr].size(); ++i) ^ user.cpp: In function ‘void read()’: user.cpp:87:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<G[N].size(); ++i) ^ user.cpp:110:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Edgiz.size(); ++i) ^ user.cpp:120:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<rs.size(); ++i) ^