Compilare: user.cpp: In function ‘bool bfs(int)’: user.cpp:25:31: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(j=0;j<d[nod].size();++j) ^ user.cpp:32:1: warning: no return statement in function returning non-void [-Wreturn-type] } ^ user.cpp: In function ‘int find(int)’: user.cpp:36:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=0;i<H[mo].size();++i) ^