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styc，有一样的clarfiy post在题目里，不过回答的回错贴 -v-

Posted by rovingcloud at 2006-07-30 17:59:21 on Problem 2892
In Reply To:Problem G Posted by:wk at 2006-07-30 16:03:33 
> Is it possible that a village was bombed twice (one by one)? If yes is 1 "R" enough to rebuild this village?
> 
> wk
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