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1086. Cryptography Time limit: 2.0 secondMemory limit: 64 MB While preparing this problem set the jury has run into the following problem: it was nece 阅读全文
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1118. Nontrivial Numbers Time limit: 2.0 secondMemory limit: 64 MB Specialists of SKB Kontur have developed a unique cryptographic algorithm for needs 阅读全文
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1104. Don’t Ask Woman about Her Age Time limit: 1.0 secondMemory limit: 64 MB Mrs Little likes digits most of all. Every year she tries to make the be 阅读全文
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1141. RSA Attack Time limit: 1.0 secondMemory limit: 64 MB The RSA problem is the following: given a positive integer n that is a product of two disti 阅读全文
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Count primes Time Limit: 12000/6000 MS (Java/Others) Memory Limit: 65536/65536 K (Java/Others) Problem Description Easy question! Calculate how many p 阅读全文
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hannnnah_j’s Biological Test Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 131072/131072 K (Java/Others) Problem Description hannnnah_j is a te 阅读全文
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1036: [ZJOI2008]树的统计Count Description 一棵树上有n个节点,编号分别为1到n,每个节点都有一个权值w。我们将以下面的形式来要求你对这棵树完成 一些操作: I. CHANGE u t : 把结点u的权值改为t II. QMAX u v: 询问从点u到点v的路径上的节 阅读全文
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Machine Schedule Description As we all know, machine scheduling is a very classical problem in computer science and has been studied for a very long h 阅读全文
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Cable master Description Inhabitants of the Wonderland have decided to hold a regional programming contest. The Judging Committee has volunteered and 阅读全文