Compilare: main.cpp: In function 'int bfs(int)': main.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int j = 0; j < ad[q[i]].size(); ++j) | ~~^~~~~~~~~~~~~~~~~ main.cpp:36:1: warning: no return statement in function returning non-void [-Wreturn-type] 36 | } | ^