Compilare: user.cpp: In function ‘bool bfs()’: user.cpp:34:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[nod].size() && nod != n; ++i){ ^ user.cpp: In function ‘int main()’: user.cpp:62:38: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < G[n].size(); ++i){ ^