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摘要： proj 1007:DNA SortingTime Limit:1000MSMemory Limit:10000KTotal Submissions:76307Accepted:30599DescriptionOne measure of ``unsortedness'' in a sequence is the number of pairs of entries that are out of order with respect to each other. For instance, in the letter sequence ``DAABEC'', 阅读全文

摘要： Maya CalendarTime Limit: 1000MSMemory Limit: 10000KTotal Submissions: 63165Accepted: 19479DescriptionDuring his last sabbatical, professor M. A. Ya made a surprising discovery about the old Maya calendar. From an old knotted message, professor discovered that the Maya civilization used a 365 day lon 阅读全文