what about this

送交者: steven 于 2008-04-30, 12:31:44:

回答: yes, 等价的组合算一个. 还可以用NOT 由 Enlighten 于 2008-04-30, 12:23:07:

(AB+AC+BC)((-A+B)(-A+B)(-B+A)(-A+C)(-C+A)(-B+C)(-C+B))

my approach was based on the assumption that - Enlighten (190 bytes) 2008-04-30, 12:43:37 (222555)
- basic properties - 4ct (662 bytes) 2008-04-30, 13:08:57 (222556)