[此贴子已经被作者于2007-6-18 21:20:22编辑过]
(1)a(I)*(11-I)
(2) 9
(3) s+a(I)*(11-I)->s
(4) Mod(11-R,11)
(5) 9
[此贴子已经被作者于2007-6-18 21:32:58编辑过]