Compilare: main.cpp: In function 'void bfs()': main.cpp:102:18: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<v[nod].size();i++) ~^~~~~~~~~~~~~~ main.cpp: In function 'int main()': main.cpp:139:8: warning: overflow in implicit constant conversion [-Woverflow] difmin=10000000000; ^~~~~~~~~~~