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Problem DescriptionXYZ is playing an interesting game called "drops". It is played on ar∗cgrid. Each grid cell is either empty, or occupied by a water... 阅读全文
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Problem DescriptionIn ann∗mmaze, the right-bottom corner is the exit (position(n,m)is the exit). In every position of this maze, there is either a0or ... 阅读全文
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DescriptionMr. Hdu is interested in Greatest Common Divisor (GCD). He wants to find more and more interesting things about GCD. Today He comes up with... 阅读全文
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Problem DescriptionThere arenpeople andmpairs of friends. For every pair of friends, they can choose to become online friends (communicating using onl... 阅读全文
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Problem DescriptionThere arenapple trees planted along a cyclic road, which isLmetres long. Your storehouse is built at position0on that cyclic road.T... 阅读全文
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DescriptionYour current task is to make a ground plan for a residential building located in HZXJHS. So you must determine a way to split the floor bui... 阅读全文
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总算今天静下心来学算法。。DescriptionInnocent Wu follows Dumb Zhang into a ancient tomb. Innocent Wu’s at the entrance of the tomb while Dumb Zhang’s at the end of... 阅读全文