Compilare: main.cpp: In function 'void bfs(int, std::vector<int>&)': main.cpp:22:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 22 | for(int i = 0; i < edges[f].size(); ++i){ | ~~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:61:19: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 61 | for(int i = 0; i < ans.size(); i++){ | ~~^~~~~~~~~~~~