Compilare: user.cpp: In function ‘bool query(int, int, std::vector<std::pair<int, int> >*)’: user.cpp:20:34: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Hash[key].size();i++) ^ user.cpp: In function ‘void bfs(int, int)’: user.cpp:45:40: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<Graf[node1].size();i++) ^