Compilare: user.cpp: In function ‘void Solve()’: user.cpp:74:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 1; j < G[i].size(); j++) ^ user.cpp:89:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < G[i].size(); j++) ^ user.cpp:111:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int j = 0; j < V[i].size(); j++) ^