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poj 3421 --X-factor Chains(数学、组合)
http://poj.org/problem?id=3421 X-factor ChainsTime Limit: 1000MS Memory Limit: 65536KTotal Submissions: 4495 Accepted: 1379DescriptionGiven原创 2011-07-09 10:06:39 · 1571 阅读 · 2 评论 -
hdu 2441-ACM(Array Complicated Manipulation)（数学）
ACM(Array Complicated Manipulation) Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s原创 2011-08-28 23:54:07 · 1311 阅读 · 1 评论 -
hdu 1717 --小数化分数2
1.有限循环小数化成分数 例1： 0.5 0.5*10=5； 0.5 = 5/10 = 1/2； 例2： 0.3275 0.3275 * 10000 = 3275 0.3275 = 3275/10000 = 131/400 ； 2.无限循环小数化分数 例1: 0.(4)原创 2011-06-16 13:45:00 · 1127 阅读 · 0 评论 -
hdu - 2608 -0 or 1(规律)
0 or 1 Time Limit: 6000/2000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 986 Accepted Submission原创 2011-08-12 02:15:34 · 1964 阅读 · 2 评论 -
hdu 4020 --Ads Proposal(排序)
http://acm.hdu.edu.cn/showproblem.php?pid=4020 Ads Proposal Time Limit: 10000/5000 MS (Java/Others) Memory Limit: 65768/6原创 2011-09-08 13:30:32 · 1168 阅读 · 0 评论 -
hdu -- 2421--Deciphering Password (分解质因数)
Deciphering Password Time Limit: 5000/1000 MS (Java/Others) Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 1044 Acce原创 2011-08-19 14:11:37 · 1684 阅读 · 0 评论 -
poj 3233 --- Matrix Power Series (二分,矩阵)
Matrix Power Series Time Limit: 3000MS Memory Limit: 131072K Total Submissions: 9393 Accepted: 4018 Description Given a n × n matrix A and a positive integer k,原创 2012-03-22 18:40:59 · 1612 阅读 · 0 评论 -
判断点在凹凸多边形内部
原文：http://paulbourke.net/geometry/insidepoly/ Determining if a point lies on the interior of a polygon Written by Paul Bourke November 1987 Solution 1 (2D) The following转载 2012-09-04 17:52:43 · 1640 阅读 · 0 评论