Compilare: main.cpp: In function 'void dfs(int)': main.cpp:18:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 18 | for(int i = 0; i < f[nod].size(); i++) | ~~^~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:19: warning: unused variable 'ap' [-Wunused-variable] 55 | const int ap = (2 * fact(n - 2) * (n - 1)) % MOD; | ^~