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HELP! 1055 题目我有几个地方不是很清楚……谁能解释一下……

Posted by rruucc at 2003-05-26 22:39:31 on Problem 1055
1.当某一个邮编(如22222)有21封时怎么办 是不是2个BUNDLES 然后留1封稍后处理?
2.当3-dig letters (如222xx)有21封时怎么办? 
这时是可以先做2个 3-dig bundle 但是应该剩222xx中的哪一封留做first class letter呢??

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