Compilare: user.cpp: In function ‘void DFS(int)’: user.cpp:13:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[k].size(); ++i) ^ user.cpp: In function ‘void numara(int)’: user.cpp:19:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for (int i=0; i<v[k].size() && N<doi; ++i) ^ user.cpp: In function ‘void sterge(int, int)’: user.cpp:24:9: warning: unused variable ‘i’ [-Wunused-variable] int i,k,ok=1; doi=1; ^ user.cpp:24:11: warning: unused variable ‘k’ [-Wunused-variable] int i,k,ok=1; doi=1; ^