Compilare: user.cpp: In function ‘int main()’: user.cpp:41:36: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (j = 0; j < order.size(); j++) ^ user.cpp:43:52: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (k = 0; k < adjList[order[j]].size(); k++) ^ user.cpp: In function ‘void DFS(int, bool*, std::vector<int>*, std::vector<int>&)’: user.cpp:60:43: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < adjList[src].size(); i++) ^