Compilare: main.cpp: In function 'void belman()': main.cpp:18:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0;i<H.size();i++){ ~^~~~~~~~~ main.cpp:21:27: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i = 0; i < v[nod].size(); i++){ ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:98:24: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int j =0;j<v[i].size();j++){ ~^~~~~~~~~~~~