Compilare: main.cpp: In function 'int bfs()': main.cpp:19:23: 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:44:21: warning: suggest parentheses around assignment used as truth value [-Wparentheses] for (int i=1; i=m; ++i) ^ main.cpp: In function 'int bfs()': main.cpp:37:1: warning: control reaches end of non-void function [-Wreturn-type] } ^