[ ][ ]

问题描述:

[ ][ ]
2[ ]-------------------
[ ][ ]9 [ ]
1 8[ ]
--------------
[ ] 0 5
[ ][ ][ ]
-------------
0

(9)(5)
--------------
2 (1) ) (1)(9) 9 (5)
1 8 (9)
--------------
(1) 0 5
(1)(0)(5)
--------------
0