Compilare: user.cpp: In function ‘bool bellmanFord(std::vector<std::vector<std::pair<int, int> > >&, std::vector<int>&)’: user.cpp:34:33: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(numrel[cr] == adjList.size()) ^ user.cpp: In function ‘int main()’: user.cpp:71:28: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<answ.size(); ++i) ^