Compilare: main.cpp: In function 'void dfs(int)': main.cpp:14:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 14 | for(int i=0;i<l[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:28:21: warning: variable 'root' set but not used [-Wunused-but-set-variable] 28 | int n, m, x, y, root, i; | ^~~~