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Super Ugly Number -- LeetCode
Write a program to find the nth super ugly number. Super ugly numbers are positive numbers whose all prime factors are in the given prime list primes  ...
分类:其他好文   时间:2016-08-18 12:59:11    阅读次数:130
PAT1015
A reversible prime in any number system is a prime whose "reverse" in that number system is also a prime. 一个反素数是任意数字系统中,不仅本身是素数反的也是素数 For example in t ...
分类:其他好文   时间:2016-08-07 18:28:58    阅读次数:118
204. Count Primes
时间复杂度:O(nloglogn) 除去小地方的trick之外,时间复杂度为,根据Mertens' theorems, ,M~=0.2614972. 具体证明见论文:http://arxiv.org/pdf/math/0504289.pdf ...
分类:其他好文   时间:2016-08-07 12:16:09    阅读次数:152
[USACO 6.4.1] The Primes
题目大意 给一个5*5的矩阵,在每个格子里面填入0~9这10个数字.要求行从左往右读,列从上往下读,两条对角线从上往下读是一个5位素数且不含前导0. 现在给出了开头的数字和行,列,对角线之和,求符合规定的所有数字矩阵. 题解 这是一道搜索题. 但盲目的搜索是会TLE的.因此,我们应当采用合理的剪枝. ...
分类:其他好文   时间:2016-08-04 13:30:32    阅读次数:195
204. Count Primes
题目: Description: Count the number of prime numbers less than a non-negative number, n. Credits:Special thanks to @mithmatt for adding this problem and ...
分类:其他好文   时间:2016-08-02 11:27:24    阅读次数:177
大素数筛子
题目地址:http://acm.fafu.edu.cn/problem.php?id=1011 Description: The problem is very simple,your job is just to calculate the sum of primes from the first ...
分类:其他好文   时间:2016-08-01 22:55:45    阅读次数:347
204. Count Primes
不解释了 ...
分类:其他好文   时间:2016-07-21 08:41:56    阅读次数:157
hdu_5104 Primes Problem()
题目链接:http://acm.hdu.edu.cn/showproblem.php?pid=5104 rimes Problem Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Tota ...
分类:其他好文   时间:2016-07-14 08:32:37    阅读次数:177
Codeforces Round #324 (Div. 2) D. Dima and Lisa (哥德巴赫猜想 + 暴力)
D. Dima and Lisa D. Dima and Lisa Dima loves representing an odd number as the sum of multiple primes, and Lisa loves it when there are at most three ...
分类:其他好文   时间:2016-07-12 21:29:38    阅读次数:193
hdu 5104(数学)
Primes Problem Time Limit: 2000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others)Total Submission(s): 2841 Accepted Submission(s): 1276 ...
分类:其他好文   时间:2016-07-11 18:48:09    阅读次数:211
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