Compilare: main.cpp: In function 'int bfs01(std::vector<std::vector<std::pair<int, int> > >&, int, int)': main.cpp:27:27: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<std::pair<int, int> >::size_type' {aka 'long unsigned int'} [-Wsign-compare] 27 | for (int i = 0; i < list[current].size(); i++) { | ~~^~~~~~~~~~~~~~~~~~~~~~ main.cpp:41:1: warning: control reaches end of non-void function [-Wreturn-type] 41 | } | ^