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[toj4111] Binomial efficient
求(nk)(mod232){n \choose k}\pmod {2^{32}} (nk)=n!k!(n?k)!{n \choose k}={n!\over{k!(n-k)!}} 根据上式,只需要枚举各质数的指数即可。即得到如下形式: 2a1×3a2×5a3…2b1×3b2×5b3?×2c1×3c2×5c3…=2a1?b1?c1×3a2?b2?c2×5a3?b3?c3…\begin{align} &...
分类:其他好文   时间:2015-08-18 01:18:37    阅读次数:198
HDOJ--2680--Choose the best route
Choose the best route Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 10372    Accepted Submission(s): 3342 Problem Description One day...
分类:其他好文   时间:2015-08-17 23:51:10    阅读次数:370
Choose the best route HDU杭电2680【dijkstra算法】
http://acm.hdu.edu.cn/showproblem.php?pid=2680 Problem Description One day , Kiki wants to visit one of her friends. As she is liable to carsickness , she wants to arrive at her friend’s home ...
分类:编程语言   时间:2015-08-17 23:49:04    阅读次数:183
hdu 2680 Choose the best route
本题链接:点击打开链接 本题大意:         输入n,m,s,代表标号为1--n,有m组数据,终点为s。每组数据输入两个点及权值。然后输入w,代表有w个起点,然后输入各起点。求起点到终点的最短时间。 解题思路:         本题也是最短路径问题。有多个起点,本题也是与hdu 一个人的旅行 采取相同的方法。另外选取一个点,将各起点据此点的距离记为0,并以此点最为起点。 具体请参考...
分类:其他好文   时间:2015-08-17 21:47:13    阅读次数:167
Choose the best route
Choose the best routeTime Limit : 2000/1000ms (Java/Other)Memory Limit : 32768/32768K (Java/Other)Total Submission(s) : 12Accepted Submission(s) : 6Pr...
分类:其他好文   时间:2015-08-17 21:18:33    阅读次数:136
hdu5305 Friends
Problem Description There are n people and m pairs of friends. For every pair of friends, they can choose to become online friends (communicating using online applications) or offline friends (...
分类:其他好文   时间:2015-08-17 19:34:53    阅读次数:114
HDU 2680:Choose the best route【Dijkstra】
Choose the best route Time Limit: 2000/1000 MS (Java/Others)    Memory Limit: 32768/32768 K (Java/Others) Total Submission(s): 10287    Accepted Submission(s): 3317 Problem Description One day...
分类:其他好文   时间:2015-08-17 17:20:33    阅读次数:129
ZOJ 3690 Choosing number(dp矩阵优化)
Choosing number Time Limit: 2 Seconds      Memory Limit: 65536 KB There are n people standing in a row. And There are m numbers, 1.2...m. Every one should choose a number. But if two persons s...
分类:其他好文   时间:2015-08-17 06:34:03    阅读次数:177
hdu 5072 Coprime (容斥)
Problem DescriptionThere are n people standing in a line. Each of them has a unique id number.Now the Ragnarok is coming. We should choose 3 people to...
分类:其他好文   时间:2015-08-16 19:33:42    阅读次数:193
如何选择机器学习算法 转
原文:http://www.52ml.net/15063.html如何选择机器学习算法2014年5月7日机器学习smallroofHow do you know what machine learning algorithm to choose for your classification pro...
分类:编程语言   时间:2015-08-16 13:32:48    阅读次数:106
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