Compilare: user.cpp: In function ‘int search(int, int, int)’: user.cpp:18:30: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] if(b+pas<G[ind].size() && Need[ind][b+pas]-Need[ind][a]<k) b+=pas; ^ user.cpp: In function ‘void Dfs(int)’: user.cpp:29:29: warning: comparison between signed and unsigned integer expressions [-Wsign-compare] for(int i=1;i<G[x].size();i++){ ^