回复：一道算术题和几个字迷: 秋 告 口

来源: SQLi 于 2009-02-23 13:30:58 [] [旧帖] [给我悄悄话] 阅读数 : (217 bytes)

There are 5 odds and 4 evens. So, one odd number should be eliminated first, the 括号 can do this, like: change 2+1 to 2(-1)=-2

by trial and error, we have:

9-8 -7+6 -5+4 +3 +2(-1)=0


秋 告 口

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