Compilare: main.cpp: In function 'void DFS(int)': main.cpp:28:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0; i<Ad[nod].size(); ++i) ~^~~~~~~~~~~~~~~ main.cpp:41:19: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1; i<MEX[nod].size(); ++i) ~^~~~~~~~~~~~~~~~