摘要:
Problem Description Chiaki is interested in an infinite sequence a1,a2,a3,..., which is defined as follows: an={1an−an−1+an−1−an−2n=1,2n≥3 Chiaki woul 阅读全文
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Farmer John and his brothers have found a new land. They are so excited and decide to build new farms on the land. The land is a rectangle and consist 阅读全文
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Problem Description Bessie and her friend Elsie decide to have a meeting. However, after Farmer John decorated hisfences they were separated into diff 阅读全文
摘要:
GTY has nn gay friends. To manage them conveniently, every morning he ordered all his gay friends to stand in a line. Every gay friend has a character 阅读全文