Compilare: main.cpp: In function 'int main()': main.cpp:52:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<ok>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 52 | for (i = 0; i < adj[node].size(); ++i) | ~~^~~~~~~~~~~~~~~~~~ main.cpp:24:18: warning: unused variable 'j' [-Wunused-variable] 24 | int n, m, i, j, a, b; | ^