摘要： #1388 : Periodic Signal 时间限制:5000ms 单点时限:5000ms 内存限制:256MB 描述 Profess X is an expert in signal processing. He has a device which can send a particular 阅读全文

摘要： 岑寂了一个暑假之后终于涨分了，借助了A题的hack大法， c题没有理解好题意，wa就放弃了，后来再样例的帮助下。。终于AC 现在还没搞懂矩阵啊。烦。。抄来别人的代码 A. Vitya in the Countryside 当n = 1时候特判0，15 1 #include <iostream> 2 阅读全文

摘要： Problem 1759 Super A^B mod C Time Limit: 1000 mSec Memory Limit : 32768 KB Time Limit: 1000 mSec Memory Limit : 32768 KB Problem Description Given A,B 阅读全文

摘要： 简单总结一下最近学习的欧拉函数 欧拉函数定义：在数论，对正整数n，欧拉函数是小于等于n的数中与n互质的数的数目，记作φ（n）。 1、φ（1） = 1； 2、n为质数， φ（n） = n-1; 3、 n是某个质数的幂次 φ（pk） = pk - pk-1 = pk*(1 – 1/p) 证：这是因为只有 阅读全文

摘要： 1343. Fairy Tale Time limit: 1.0 secondMemory limit: 64 MB 12 months to sing and dance in a ring their celestial dance. One after another they hold a 阅读全文

摘要： 1356. Something Easier Time limit: 1.0 secondMemory limit: 64 MB “How do physicists define prime numbers? Very easily: prime numbers are the number 2 阅读全文

摘要： 1091. Tmutarakan Exams Time limit: 1.0 secondMemory limit: 64 MB University of New Tmutarakan trains the first-class specialists in mental arithmetic. 阅读全文

摘要： 1261. Tips Time limit: 1.0 secondMemory limit: 64 MB The favorite resting place of the Ural programmers is Threenland island. There is only one tribul 阅读全文

摘要： 1748. The Most Complex Number Time limit: 1.0 secondMemory limit: 64 MB Let us define a complexity of an integer as the number of its divisors. Your t 阅读全文

摘要： 1355. Bald Spot Revisited Time limit: 1.0 secondMemory limit: 64 MB A student dreamt that he walked along the town where there were lots of pubs. He d 阅读全文

摘要： 1049. Brave Balloonists Time limit: 2.0 secondMemory limit: 64 MB Ten mathematicians are flying on a balloon over the Pacific ocean. When they are cro 阅读全文

摘要： 1204. Idempotents Time limit: 1.0 secondMemory limit: 64 MB The number x is called an idempotent modulo n if The number x is called an idempotent modu 阅读全文

摘要： 2070. Interesting Numbers Time limit: 2.0 secondMemory limit: 64 MB Nikolay and Asya investigate integers together in their spare time. Nikolay thinks 阅读全文

摘要： 1133. Fibonacci Sequence Time limit: 1.0 secondMemory limit: 64 MB is an infinite sequence of integers that satisfies to Fibonacci condition Fi + 2 =  阅读全文

摘要： 1352. Mersenne Primes Time limit: 1.0 secondMemory limit: 64 MB Definition. If the number 2N−1 is prime then it is called a Mersenne prime number. Def 阅读全文