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Milk Patterns Description Farmer John has noticed that the quality of milk given by his cows varies from day to day. On further investigation, he disc 阅读全文
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Life Forms Description You may have wondered why most extraterrestrial life forms resemble humans, differing by superficial traits such as height, col 阅读全文
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Musical Theme Description A musical melody is represented as a sequence of N (1<=N<=20000)notes that are integers in the range 1..88, each representin 阅读全文