Compilare: main.cpp: In function 'int bfs(int, int)': main.cpp:42:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 42 | for(int i=0; i<l[nod].size(); i++) | ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:116:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 116 | for(int j=0; j<l[i].size(); j++) | ~^~~~~~~~~~~~