3 Jan
2012
3 Jan
'12
2:07 a.m.
An array with destructive updates (IO/ST) may help. You can also look into the exact cover problem and dancing links. If I recall correctly, this problem can be transformed to a 729*324 matrix. 在 2012-1-3 上午8:10，"Peter Hall" <peter.hall@memorphic.com>写道：