Compilare: main.cpp: In function 'void dfsd(int, int)': main.cpp:13:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 13 | for (int i=0; i<v[nod].size (); i++) | ~^~~~~~~~~~~~~~~ main.cpp: In function 'void dfsu(int, int)': main.cpp:29:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for (int i=0; i<v[nod].size (); i++) | ~^~~~~~~~~~~~~~~ main.cpp:33:17: warning: unused variable 'ok' [-Wunused-variable] 33 | int ok=1; | ^~