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摘要: Uva 11181 Probability|GivenProblem's Link: http://acm.hust.edu.cn/vjudge/problem/viewProblem.action?id=18546Mean:n个人去逛超市,第i个人会购买东西的概率是Pi。出超市以后发现有r个人买了... 阅读全文
posted @ 2015-05-17 22:17 北岛知寒 阅读(203) 评论(0) 推荐(0)