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Description在一个奇怪的村子中，很多人的名字都很长，比如aaaaa, bbb and abababab。名字这么长，叫全名显然起来很不方便。所以村民之间一般只叫名字的前缀。比如叫'aaaaa'的时候可以只叫'aaa'，因为没有第二个人名字的前三个字母是'aaa'。不过你不能叫'a'，因为有... 阅读全文
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Time Limit:1000MSMemory Limit:65536KTotal Submissions:2292Accepted:878DescriptionA tree (i.e. a connected graph without cycles) with vertices numbered... 阅读全文
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H -高桥和低桥Time Limit:1000MSMemory Limit:131072KB64bit IO Format:%lld & %lluSubmitStatusPracticeCSU 1335Description有个脑筋急转弯是这样的：有距离很近的一高一低两座桥，两次洪水之后高桥被淹了两... 阅读全文
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Description你有一行盒子，从左到右依次编号为1, 2, 3,…, n。你可以执行四种指令：1 X Y表示把盒子X移动到盒子Y左边（如果X已经在Y的左边则忽略此指令）。2 X Y表示把盒子X移动到盒子Y右边（如果X已经在Y的右边则忽略此指令）。3 X Y表示交换盒子X和Y的位置。4 表示反转... 阅读全文
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DescriptionChosen Problem Solving and Program design as an optional course, you are required to solve all kinds of problems. Here, we get a new proble... 阅读全文
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DescriptionConsider an arbitrary sequence of integers. One can place + or - operators between integers in the sequence, thus deriving different arithm... 阅读全文
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Poetry is a form of literature that uses aesthetic and rhythmic qualities of language. There are many famous poets in the contemporary era. It is said... 阅读全文
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开关题 尺度法 FliptileTime Limit:2000MSMemory Limit:65536KTotal Submissions:3394Accepted:1299DescriptionFarmer John knows that an intelle... 阅读全文
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Face The Right WayTime Limit:2000MSMemory Limit:65536KTotal Submissions:2564Accepted:1177DescriptionFarmer John has arrang... 阅读全文
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DescriptionJessica'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 ... 阅读全文