Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:20:18: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 20 | for(int i=0;i<l[nod].size();i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:48:8: warning: 'xs' may be used uninitialized in this function [-Wmaybe-uninitialized] 48 | dfs(xs, 1); | ~~~^~~~~~~