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SquaresTime Limit: 3500MSMemory Limit: 65536KTotal Submissions: 10585Accepted: 3825DescriptionA square is a 4-sided polygon whose sides have equal length and adjacent sides form 90-degree angles. It is also a polygon such that rotating about its centre by 90 degrees gives the same polygon. It is not 阅读全文
posted @ 2011-12-17 16:57
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Shortest PrefixesTime Limit: 1000MSMemory Limit: 30000KTotal Submissions: 7814Accepted: 3297DescriptionA prefix of a string is a substring starting at the beginning of the given string. The prefixes of "carbon" are: "c", "ca", "car", "carb", "ca 阅读全文
posted @ 2011-12-17 16:56
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The PeanutsTime Limit: 1000MSMemory Limit: 30000KTotal Submissions: 6217Accepted: 2614DescriptionMr. Robinson and his pet monkey Dodo love peanuts very much. One day while they were having a walk on a country road, Dodo found a sign by the road, pasted with a small piece of paper, saying "Free 阅读全文
posted @ 2011-12-17 09:45
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Parallelogram CountingTime Limit: 5000MSMemory Limit: 65536KTotal Submissions: 5130Accepted: 1699DescriptionThere are n distinct points in the plane, given by their integer coordinates. Find the number of parallelograms whose vertices lie on these points. In other words, find the number of 4-element 阅读全文
posted @ 2011-12-17 09:45
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Flooded!Time Limit: 1000MSMemory Limit: 30000KTotal Submissions: 3884Accepted: 1258Special JudgeDescriptionTo enable homebuyers to estimate the cost of flood insurance, a real-estate firm provides clients with the elevation of each 10-meter by 10-meter square of land in regions where homes may be pu 阅读全文
posted @ 2011-12-17 09:44
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Hardwood SpeciesTime Limit: 10000MSMemory Limit: 65536KTotal Submissions: 12166Accepted: 5000DescriptionHardwoods are the botanical group of trees that have broad leaves, produce a fruit or nut, and generally go dormant in the winter. America's temperate climates produce forests with hundreds of 阅读全文
posted @ 2011-12-17 09:43
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Simply SyntaxTime Limit: 1000MSMemory Limit: 10000KTotal Submissions: 4344Accepted: 1912DescriptionIn the land of Hedonia the official language is Hedonian. A Hedonian professor had noticed that many of her students still did not master the syntax of Hedonian well. Tired of correcting the many synta 阅读全文
posted @ 2011-12-17 09:42
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