divisable by 9
所有跟帖:
• 回复:divisable by 9 -神秘大坑- ♂ (174 bytes) () 01/28/2008 postreply 18:33:54
• 回复:divisable by 9 -passenger101- ♂ (205 bytes) () 01/29/2008 postreply 08:38:42
• 证明一下 A+10B+100C+1000D+....=> =(A+B+C+D+...)+9B+99C+999D+... -方程- ♂ (172 bytes) () 02/01/2008 postreply 17:58:36