nữa nè:hãy nêu cụ thể là ở dòng nào nhé!
tìm chữ 0 trong bản sau
999999999999999999999999999999999999999999999999099999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999099999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999900999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999999909999999999999999999999999999999999999999999999999999
câu hỏi ngắn:
1giây=..........
lẹ đi gâu ai nhanh tick trong 4 phút tiếp
dòng thứ 2 1 số 0
dòng thứ 3 2 số 0
dòng kế cuổi 1 số 0
có 4 số 0