Compilare: user.cpp: In function ‘void Solve()’: user.cpp:13:9: warning: variable ‘nodes’ set but not used [-Wunused-but-set-variable] int nodes = 0; ^ user.cpp: In function ‘void Print()’: user.cpp:52:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[i].size(); j++) ^