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A. Little Artem and Presents 题目连接： http://www.codeforces.com/contest/669/problem/A Description Little Artem got n stones on his birthday and now wants 阅读全文
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Robot 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=5673 Description There is a robot on the origin point of an axis.Every second, the robot can mov 阅读全文
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String 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=5672 Description There is a string S.S only contain lower case English character.(10≤length(S)≤ 阅读全文
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Matrix 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=5671 Description There is a matrix M that has n rows and m columns (1≤n≤1000,1≤m≤1000).Then we 阅读全文
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Machine 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=5670 Description There is a machine with m(2≤m≤30) coloured bulbs and a button.When the button 阅读全文
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F. Four Divisors 题目连接： http://www.codeforces.com/contest/665/problem/F Description If an integer a is divisible by another integer b, then b is called 阅读全文
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E. Beautiful Subarrays 题目连接： http://www.codeforces.com/contest/665/problem/E Description One day, ZS the Coder wrote down an array of integers a with 阅读全文
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D. Simple Subset 题目连接： http://www.codeforces.com/contest/665/problem/D Description A tuple of positive integers {x1, x2, ..., xk} is called simple if 阅读全文
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C. Simple Strings 题目连接： http://www.codeforces.com/contest/665/problem/C Description zscoder loves simple strings! A string t is called simple if every 阅读全文
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B. Shopping 题目连接： http://www.codeforces.com/contest/665/problem/B Description Ayush is a cashier at the shopping center. Recently his department has s 阅读全文
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A. Buses Between Cities 题目连接： http://www.codeforces.com/contest/665/problem/A Description Buses run between the cities A and B, the first one is at 05 阅读全文
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E. Interesting Graph and Apples 题目连接： http://www.codeforces.com/contest/9/problem/E Description Hexadecimal likes drawing. She has drawn many graphs a 阅读全文
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D. How many trees? 题目连接： http://www.codeforces.com/contest/9/problem/D Description In one very old text file there was written Great Wisdom. This Wisd 阅读全文
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C. Hexadecimal's Numbers 题目连接： http://www.codeforces.com/contest/9/problem/C Description One beautiful July morning a terrible thing happened in Mainf 阅读全文
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B. Running Student 题目连接： http://www.codeforces.com/contest/9/problem/B Description And again a misfortune fell on Poor Student. He is being late for a 阅读全文
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A. Die Roll 题目连接： http://www.codeforces.com/contest/9/problem/A Description Yakko, Wakko and Dot, world famous animaniacs, decided to rest from acting 阅读全文
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1035 最长的循环节 题目连接： https://www.51nod.com/onlineJudge/questionCode.html !problemId=1035 Description 正整数k的倒数1/k，写为10进制的小数如果为无限循环小数，则存在一个循环节，求 using names 阅读全文
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模板如下： 扩展版本： 求解a^k=b %p 求k,最小的k一定小于p,否则会重复，否则无解 gcd(a,p)=1时 设k=mi+v m=sqrt(p); i,v include include define MOD 76543 using namespace std; int hs[MOD], h 阅读全文
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1040 最大公约数之和 题目连接： https://www.51nod.com/onlineJudge/questionCode.html !problemId=1040 Description 给出一个n，求1 n这n个数，同n的最大公约数的和。比如：n = 6 1,2,3,4,5,6 同6的最 阅读全文
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1179 最大的最大公约数 题目连接： https://www.51nod.com/onlineJudge/questionCode.html !problemId=1179 Description 给出N个正整数，找出N个数两两之间最大公约数的最大值。例如：N = 4，4个数为：9 15 25 1 阅读全文
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2818: Gcd 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=2818 Description 给定整数N，求1 using namespace std; const int maxn = 1e7+5; long long phi[m 阅读全文
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嘿嘿嘿，去川大了。 川大好大，清水渠校区真是辣鸡。 妹子好多，清水寺校区真是辣鸡。 河好大，清水沟校区太辣鸡了。 比赛开始了。 前八道题都是水题，嘿嘿嘿就过去了 然后看到了最不擅长的数学题，交给擅长的老司机去做，然后我就开始划水了。 嘿嘿嘿，比赛就结束了。 嘿嘿嘿，然后去聚餐。 嘿嘿嘿，吃的好饱。 阅读全文
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4484: The Graver Robbers' Chronicles 题目连接： http://acm.scu.edu.cn/soj/problem.action?id=4484 Description One day, Kylin Zhang and Wu Xie are trapped in 阅读全文
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4493: DNA 题目连接： http://acm.scu.edu.cn/soj/problem.action?id=4493 Description Deoxyribonucleic acid (DNA) is a molecule that carries most of the geneti 阅读全文
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2976: [Poi2002]出圈游戏 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=2976 Description Input 中第一行有一个正整数n, 2 include include include using namespac 阅读全文
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4443: [Scoi2015]小凸玩矩阵 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=4443 Description 小凸和小方是好朋友，小方给小凸一个N M（N using namespace std; const int MAX 阅读全文
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4429: frog's dice 题目连接： http://acm.scu.edu.cn/soj/problem.action?id=4429 Description frog has many dices:) Each dice has six surfaces and there is a l 阅读全文
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4427: Miss Zhao's Graph 题目连接： http://acm.scu.edu.cn/soj/problem.action?id=4427 Description Mr Jiang gives Miss Zhao a problem about graphs. Unfortunat 阅读全文
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4423: Necklace 题目连接： http://acm.scu.edu.cn/soj/problem.action?id=4423 Description baihacker bought a necklace for his wife on their wedding anniversar 阅读全文
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C. Looking for Order 题目连接： http://www.codeforces.com/contest/8/problem/C Description Girl Lena likes it when everything is in order, and looks for ord 阅读全文
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4500: 矩阵 题目连接： http://www.lydsy.com/JudgeOnline/problem.php?id=4500 Description 有一个n m的矩阵，初始每个格子的权值都为0，可以对矩阵执行两种操作： 1. 选择一行， 该行每个格子的权值加1或减1。 2. 选择一列， 阅读全文
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B. Obsession with Robots 题目连接： http://www.codeforces.com/contest/8/problem/B Description The whole world got obsessed with robots,and to keep pace wit 阅读全文
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A. Train and Peter 题目连接： http://www.codeforces.com/contest/8/problem/A Description Peter likes to travel by train. He likes it so much that on the tra 阅读全文
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ABCDE 题目连接： http://acm.uestc.edu.cn/ /problem/show/1307 Description Binary coded decimal (BCD) is a kind of binary encodings of decimal numbers where 阅读全文
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Hash Perfectly 题目连接： http://acm.uestc.edu.cn/ /problem/show/1314 Description In computing, a hash table is a data structure used to implement an assoc 阅读全文
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3 idiots 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=4609 Description King OMeGa catched three men who had been streaking in the street. Looking a 阅读全文
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A B Problem Plus 题目连接： http://acm.hdu.edu.cn/showproblem.php?pid=1402 Description Calculate A \ B. Input Each line will contain two integers A and B. 阅读全文
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FFT，这份代码在51nod跑的非常快，赶紧扒下来！ //FFT 大整数乘法 include include include include using namespace std; const int N = 500005; const double pi = acos( 1.0); char s 阅读全文
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跟着一群小伙伴做一些奇怪的东西 所以就要研究下面的代码了QAQ ;剧本文件大概就是这样，";"号后面是注释，被/ /框住的也是注释， ;标签符号是[]或者@，跟krkr一样，不过@后面只能跟一行命令噢。 ;[p]标签比较常用，作用是暂停，点击鼠标执行下一行命令 @call file=wide/lib 阅读全文
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E. Different Subsets For All Tuples 题目连接： http://www.codeforces.com/contest/660/problem/E Description For a sequence a of n integers between 1 and m, 阅读全文