回复：解释：|OOO|OOOOOOOOOO|O||OOOOO|.....|OOO|||O|OOOOOOOOO|O|

Maybe some simple example can remind you,smart sir.My typing is very poor,can't say more.

m=n=4,(1,1,1,1)(4,1),(4,3),(3,4),(1,4)
(1,2,0,1)(4,1),(4,3),(4,4),(1,4)
(0,4,0,0)(4,2),(4,3),(4,4),(3,4)
(0,2,2,0)(4,2),(4,3),(3,4),(2,4)
.....