[Haskell-beginners] suggestions for optimizing sudoku solver

[Ray Song]

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 at memorphic.com>写道：
-------------- next part --------------
An HTML attachment was scrubbed...
URL: <http://www.haskell.org/pipermail/beginners/attachments/20120103/e61812f9/attachment-0001.htm>