DescriptionGerald got a very curious hexagon for his birthday. The boy found out that all the angles of the hexagon are equal to. Then he measured the...
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其他好文 时间:
2015-08-19 12:42:47
阅读次数:
81
DescriptionThe Sky is Sprite.The Birds is Fly in the Sky.The Wind is Wonderful.Blew Throw the TreesTrees are Shaking, Leaves are Falling.Lovers Walk p...
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其他好文 时间:
2015-08-19 09:23:50
阅读次数:
106
DescriptionSometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose you are in a party whe...
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其他好文 时间:
2015-08-18 18:51:11
阅读次数:
100
Description 小明对数的研究比较热爱,一谈到数,脑子里就涌现出好多数的问题,今天,小明想考考你对素数的认识。 问题是这样的:一个十进制数,如果是素数,而且它的各位数字和也是素数,则称之为“美素数”,如29,本身是素数,而且2+9 = 11也是素数,所以它是美素数。 给定一个区间,你能...
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其他好文 时间:
2015-08-17 23:04:01
阅读次数:
130
工作中编写过的一条语句select * from Bt_Holiday where to_char(Setting_DATE,'YYYY')=Substr('2015-03-00',1,4) AND to_char(Setting_DATE,'MM')=Substr('2015-03-...
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数据库 时间:
2015-08-17 21:31:05
阅读次数:
392
DescriptionThere is a hill with n holes around. The holes are signed from 0 to n-1.A rabbit must hide in one of the holes. A wolf searches the rabbit ...
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其他好文 时间:
2015-08-17 17:05:35
阅读次数:
94
Problem DescriptionDuring summer vacation,Alice stay at home for a long time, with nothing to do. She went out and bought m pokers, tending to play po...
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其他好文 时间:
2015-08-17 06:26:56
阅读次数:
200
DescriptionThe world financial crisis is quite a subject. Some people are more relaxed while others are quite anxious. John is one of them. He is very...
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其他好文 时间:
2015-08-16 21:14:56
阅读次数:
116
DescriptionLetxandybe two strings over some finite alphabetA. We would like to transformxintoyallowing only operations given below:Deletion:a letter i...
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其他好文 时间:
2015-08-16 19:48:49
阅读次数:
106
Description一组研究人员正在设计一项实验,以测试猴子的智商。他们将挂香蕉在建筑物的屋顶,同时,提供一些砖块给这些猴子。如果猴子足够聪明,它应当能够通过合理的放置一些砖块建立一个塔,并爬上去吃他们最喜欢的香蕉。研究人员有n种类型的砖块,每种类型的砖块都有无限个。第i块砖块的长宽高分别用xi,...
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其他好文 时间:
2015-08-16 19:46:56
阅读次数:
150