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Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the leve 阅读全文
posted @ 2018-08-01 21:49
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Description For the daily milking, Farmer John's N cows (1 ≤ N ≤ 50,000) always line up in the same order. One day Farmer John decides to organize a g 阅读全文
posted @ 2018-08-01 10:54
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