Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:13:19: 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 'int main()': main.cpp:79:19: warning: 'ok' may be used uninitialized in this function [-Wmaybe-uninitialized] 79 | fout << ok << "\n"; | ^~~~