Compilare: main.cpp: In function 'void DFS(int)': main.cpp:18:22: 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:79:26: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i = 0; i < sol.size(); ++i) ~~^~~~~~~~~~~~ main.cpp:74:9: warning: unused variable 'ok' [-Wunused-variable] int ok = verif(); ^~