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Problem H: [USACO 2.3.4]货币系统http://www.acmore.net/problem.php?cid=1012&pid=7Time Limit:1 SecMemory Limit:64 MBSubmit:42Solved:23SubmitStatusWeb BoardDescription母牛们不但创建了他们自己的政府而且选择了建立了自己的货币系统。 [In their own rebellious way],，他们对货币的数值感到好奇。传统地，一个货币系统是由1,5,10,20 或 25,50, 和 100的单位面值组成的。母牛想知道有多少种不同的方法来 阅读全文
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Big Christmas TreeTime Limit:3000MSMemory Limit:131072KTotal Submissions:18303Accepted:3881DescriptionChristmas is coming to KCM city. Suby the loyal civilian in KCM city is preparing a big neat Christmas tree. The simple structure of the tree is shown in right picture.The tree can be represented as 阅读全文
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Fiber NetworkTime Limit:1000MSMemory Limit:65536KTotal Submissions:2660Accepted:1221DescriptionSeveral startup companies have decided to build a better Internet, called the "FiberNet". They have already installed many nodes that act as routers all around the world. Unfortunately, they star 阅读全文
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Play on WordsTime Limit:1000MSMemory Limit:10000KTotal Submissions:7970Accepted:2802DescriptionSome of the secret doors contain a very interesting word puzzle. The team of archaeologists has to solve it to open that doors. Because there is no other way to open the doors, the puzzle is very important 阅读全文
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The Unique MSTTime Limit:1000MSMemory Limit:10000KTotal Submissions:16690Accepted:5782DescriptionGiven a connected undirected graph, tell if its minimum spanning tree is unique.Definition 1 (Spanning Tree): Consider a connected, undirected graph G = (V, E). A spanning tree of G is a subgraph of G, s 阅读全文
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Optimal MilkingTime Limit:2000MSMemory Limit:30000KTotal Submissions:9498Accepted:3433Case Time Limit:1000MSDescriptionFJ has moved his K (1 <= K <= 30) milking machines out into the cow pastures among the C (1 <= C <= 200) cows. A set of paths of various lengths runs among the cows and 阅读全文
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1508: ZZ’s Fibonacci Problemhttp://www.acmore.net/problem.php?id=1508Time Limit:1 SecMemory Limit:64 MBSubmit:67Solved:14SubmitStatusWeb BoardDescription ZZ is a big fan of Fibonacci numbers, and she pays lots of attention on Fibonacci numbers, Fibonacci numbers have the following form: F(1) = 1, .. 阅读全文