Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:19:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 19 | for (int i=0;i<g[nod].size ();++i){ | ~^~~~~~~~~~~~~~~