Compilare: main.cpp: In function 'void bfs(int)': main.cpp:29:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 29 | for(int i=0; i<v[nod].size(); i++){ | ~^~~~~~~~~~~~~~