Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:21:21: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 21 | for( int i = 0; i < v[node].size(); ++i ) | ~~^~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:30:19: warning: unused variable 'root' [-Wunused-variable] 30 | int n, x, y, i, root; | ^~~~