Compilare: main.cpp: In function 'void DFS(int, std::vector<bool>&, std::vector<int>&)': main.cpp:17:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (auto i = 0; i < A[nod].size(); i++) ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:63:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < A[postordine[i]].size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~ main.cpp:76:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j = 0; j < A[postordine[i]].size(); j++) ~~^~~~~~~~~~~~~~~~~~~~~~~~~