摘要: Time Limit: 1000MSMemory Limit: 65536KTotal Submissions: 4166Accepted: 1652DescriptionThis problem is based on an exercise of David Hilbert, who pedagogically suggested that one study the theory of 4n... 阅读全文
posted @ 2009-10-22 06:18 Weiyu Wang 阅读(718) 评论(0) 推荐(0) 编辑
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