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题目 1013 Battle Over Cities (25分) It is vitally important to have all the cities connected by highways in a war. If a city is occupied by the enemy, al 阅读全文
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题目 1012 The Best Rank (25分) To evaluate the performance of our first year CS majored students, we consider their grades of three courses only: C - C P 阅读全文
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题目 1011 World Cup Betting (20分) With the 2010 FIFA World Cup running, football fans the world over were becoming increasingly excited as the best play 阅读全文