摘要:
首先看一下题目 Consider the set of all reduced fractions between 0 and 1 inclusive with denominators less than or equal to N. Here is the set when N = 5: Wri 阅读全文
摘要:
首先看一下题目。 In a stroke of luck almost beyond imagination, Farmer John was sent a ticket to the Irish Sweepstakes (really a lottery) for his birthday. Th 阅读全文