Compilare: main.cpp: In function 'void rec(int, int)': main.cpp:10:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 10 | for(int i = 0; i < adj[nod].size(); i++){ | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:25:21: warning: variable 'ok' set but not used [-Wunused-but-set-variable] 25 | int m, a, b, c, ok = 0; | ^~