Compilare: main.cpp: In function 'bool bfs()': main.cpp:43:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 43 | for(int i=0; i<adj_list[nod].size(); i++) | ~^~~~~~~~~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:85:23: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 85 | for(int i=0; i<adj_list[n].size(); i++) | ~^~~~~~~~~~~~~~~~~~~