PHOTO-Chụp ảnh
/ckfinder/userfiles/files/VOI20192020/LMH%20Buoi%201.pdf
Input
9 1 5 7 8 9 2 4 3 6 2 4 6 1 3 5 7 9 8 3 5 7 9 2 4 6 8 1 1 3 7 5 9 2 4 6 8 1 7 3 5 9 2 4 6 8
Output
1 3 5 7 9 2 4 6 8
Nguồn: LMH'1920