Compilare: main.cpp: In function 'int BFS()': main.cpp:28:22: warning: comparison of integer expressions of different signedness: 'int' and 'std::vector<int>::size_type' {aka 'long unsigned int'} [-Wsign-compare] 28 | for(int x=0;x<v[nod].size();++x) | ~^~~~~~~~~~~~~~ main.cpp:25:13: warning: unused variable 'val' [-Wunused-variable] 25 | int val=Q.front().cost; | ^~~ main.cpp:45:1: warning: control reaches end of non-void function [-Wreturn-type] 45 | } | ^