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描述One day,Tom’s girlfriend give him an array A which contains N integers and asked him:Can you choose some integers from the N integers and the sum of... 阅读全文
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描述There is a game which is called 24 Point game.In this game , you will be given some numbers. Your task is to find an expression which have all the g... 阅读全文
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描述今天是阴历七月初五，acm队员zb的生日。zb正在和C小加、never在武汉集训。他想给这两位兄弟买点什么庆祝生日，经过调查，zb发现C小加和never都很喜欢吃西瓜，而且一吃就是一堆的那种，zb立刻下定决心买了一堆西瓜。当他准备把西瓜送给C小加和never的时候，遇到了一个难题，never和C... 阅读全文
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Problem Description呃......变形课上Harry碰到了一点小麻烦,因为他并不像Hermione那样能够记住所有的咒语而随意的将一个棒球变成刺猬什么的,但是他发现了变形咒语的一个统一规律:如果咒语是以a开头b结尾的一个单词,那么它的作用就恰好是使A物体变成B物体. Harry已经... 阅读全文
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Problem DescriptionThe sky was brushed clean by the wind and the stars were cold in a black sky. What a wonderful night. You observed that, sometimes ... 阅读全文