Compilare: main.cpp: In function 'void dfs(int, long long int)': main.cpp:23:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 23 | for( int i = 0; i < v[node].size(); ++i ) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:32:16: warning: unused variable 'root' [-Wunused-variable] 32 | int n, x, i, root; | ^~~~