Compilare: main.cpp: In function 'bool bfs(int)': main.cpp:40:24: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 40 | for (int j=0; j<la[front].size(); j++) | ~^~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:55:18: warning: 'dr' may be used uninitialized in this function [-Wmaybe-uninitialized] 55 | int m, st=1, dr, mij; | ^~