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Descriptionnparticipants of the competition were split intomteams in some manner so that each team has at least one participant. After the competition... 阅读全文
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DescriptionColonel hasnbadges. He wants to give one badge to every of hisnsoldiers. Each badge has acoolness factor, which shows how much it's owner r... 阅读全文
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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... 阅读全文
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DescriptionGiven a dice withnsides, you have to find the expected number of times you have to throw that dice to see all its faces at least once. Assu... 阅读全文
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DescriptionAs Harry Potter series is over, Harry has no job. Since he wants to make quick money, (he wants everything quick!) so he decided to rob ban... 阅读全文
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Description大家常常感慨，要做好一件事情真的不容易，确实，失败比成功容易多了！ 做好“一件”事情尚且不易，若想永远成功而总从不失败，那更是难上加难了，就像花钱总是比挣钱容易的道理一样。 话虽这样说，我还是要告诉大家，要想失败到一定程度也是不容易的。比如，我高中的时候，就有一个神奇的女生，在... 阅读全文
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DescriptionTomorrow is contest day, Are you all ready? We have been training for 45 days, and all guys must be tired.But , you are so lucky comparing ... 阅读全文
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DescriptionThe Sky is Sprite. The Birds is Fly in the Sky. The Wind is Wonderful. Blew Throw the Trees Trees are Shaking, Leaves are Falling. Lovers W... 阅读全文
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DescriptionSometimes some mathematical results are hard to believe. One of the common problems is the birthday paradox. Suppose you are in a party whe... 阅读全文
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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 ... 阅读全文