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Physics ExperimentTime Limit:1000MSMemory Limit:65536KTotal Submissions:784Accepted:266Special JudgeDescriptionSimon is doing a physics experiment withNidentical balls with the same radius ofRcentimeters. Before the experiment, allNballs are fastened within a vertical tube one by one and the lowest 阅读全文
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4 Values whose Sum is 0Time Limit:15000MSMemory Limit:228000KTotal Submissions:14475Accepted:4138Case Time Limit:5000MSDescriptionThe SUM problem can be formulated as follows: given four lists A, B, C, D of integer values, compute how many quadruplet (a, b, c, d ) ∈ A x B x C x D are such that a + b 阅读全文
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The Water BowlsTime Limit:1000MSMemory Limit:65536KTotal Submissions:4088Accepted:1609DescriptionThe cows have a line of 20 water bowls from which they drink. The bowls can be either right-side-up (properly oriented to serve refreshing cool water) or upside-down (a position which holds no water). Th 阅读全文
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FliptileTime Limit:2000MSMemory Limit:65536KTotal Submissions:3062Accepted:1178DescriptionFarmer John knows that an intellectually satisfied cow is a happy cow who will give more milk. He has arranged a brainy activity for cows in which they manipulate anM×Ngrid (1 ≤M≤ 15; 1 ≤N≤ 15) of square t 阅读全文
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Face The Right WayTime Limit:2000MSMemory Limit:65536KTotal Submissions:2193Accepted:1039DescriptionFarmer John has arranged hisN(1 ≤N≤ 5,000) cows in a row and many of them are facing forward, like good cows. Some of them are facing backward, though, and he needs them all to face forward to make hi 阅读全文
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Bound FoundTime Limit:5000MSMemory Limit:65536KTotal Submissions:1445Accepted:487Special JudgeDescriptionSignals of most probably extra-terrestrial origin have been received and digitalized by The Aeronautic and Space Administration (that must be going through a defiant phase: "But I want to us 阅读全文
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D. Upgrading Arraytime limit per test1 secondmemory limit per test256 megabytesinputstandard inputoutputstandard outputYou have an array of positive integersa[1], a[2], ..., a[n]and a set ofbadprime numbersb1, b2, ..., bm. The prime numbers that do not occur in the setbare consideredgood. Thebeautyo 阅读全文
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Graveyard DesignTime Limit:10000MSMemory Limit:64000KTotal Submissions:4443Accepted:946Case Time Limit:2000MSDescriptionKing George has recently decided that he would like to have a new design for the royal graveyard. The graveyard must consist of several sections, each of which must be a square of 阅读全文
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Sum of Consecutive Prime NumbersTime Limit:1000MSMemory Limit:65536KTotal Submissions:17965Accepted:9871DescriptionSome positive integers can be represented by a sum of one or more consecutive prime numbers. How many such representations does a given positive integer have? For example, the integer 5 阅读全文
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Jessica's Reading ProblemTime Limit:1000MSMemory Limit:65536KTotal Submissions:6496Accepted:1998DescriptionJessica's a very lovely girl wooed by lots of boys. Recently she has a problem. The final exam is coming, yet she has spent little time on it. If she wants to pass it, she has to master 阅读全文