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Problem Description In the year 8888, the Earth is ruled by the PPF Empire . As the population growing , PPF needs to find more land for the newborns 阅读全文
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Problem Description FatMouse prepared M pounds of cat food, ready to trade with the cats guarding the warehouse containing his favorite food, JavaBean 阅读全文
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Problem Description An inch worm is at the bottom of a well n inches deep. It has enough energy to climb u inches every minute, but then has to rest a 阅读全文
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Problem Description 完数的定义：如果一个大于1的正整数的所有因子之和等于它的本身，则称这个数是完数，比如6，28都是完数：6=1+2+3；28=1+2+4+7+14。本题的任务是判断两个正整数之间完数的个数。 Input 输入数据包含多行，第一行是一个正整数n，表示测试实例的个数 阅读全文
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Problem Description 挂盐水的时候，如果滴起来有规律，先是滴一滴，停一下；然后滴二滴，停一下；再滴三滴，停一下...，现在有一个问题：这瓶盐水一共有VUL毫升，每一滴是D毫升，每一滴的速度是一秒（假设最后一滴不到D毫升，则花费的时间也算一秒），停一下的时间也是一秒这瓶水什么时候能挂 阅读全文