Compilare: main.cpp: In function 'int main()': main.cpp:81:20: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 81 | for ( i = 0; i < vans.size(); i++ ) | ~~^~~~~~~~~~~~~ main.cpp: In function 'int bfs()': main.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] 37 | } | ^