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A1055 The World's Richest（25 分） Forbes magazine publishes every year its list of billionaires based on the annual ranking of the world's wealthiest pe 阅读全文
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A1025 PAT Ranking (25)（25 分） Programming Ability Test (PAT) is organized by the College of Computer Science and Technology of Zhejiang University. Eac 阅读全文
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A1016 Phone Bills (25)（25 分） A long distance telephone company charges its customers by the following rules: Making a long distance call costs a certa 阅读全文