Compilare: user.cpp: In function ‘void BFS(int)’: user.cpp:30:35: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < G[nod].size(); ++i) ^ user.cpp: In function ‘int main()’: user.cpp:75:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < G[i].size(); ++j) ^ user.cpp:100:39: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < GCOMP[nod].size(); ++i) ^