Compilare: main.cpp: In function 'void dfs(int, int)': main.cpp:52:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ok>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (int i = 0; i < adj[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:108:21: warning: unused variable 'j' [-Wunused-variable] 108 | int n, m, k, i, j, a, b, c, cnt = 0; | ^ main.cpp:108:33: warning: unused variable 'cnt' [-Wunused-variable] 108 | int n, m, k, i, j, a, b, c, cnt = 0; | ^~~