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Sicily 1050. Numbers & Letters
1050. Numbers & Letters Constraints Time Limit: 3 secs, Memory Limit: 32 MB Description In the early 80’s, a popular TV show on Dutch television was ‘Cijfers en Letters’ (Numbers and Let...
分类:其他好文   时间:2015-03-31 09:03:22    阅读次数:142
Sicily 1001. Alphacode
1001. AlphacodeConstraintsTime Limit: 1 secs, Memory Limit: 32 MBDescriptionAlice and Bob need to send secret messages to each other and are discussing ways to encode their messages: Alice: "Let's jus...
分类:其他好文   时间:2015-03-31 09:03:10    阅读次数:154
swift之元组类型
一、元组类型是有N个任意类型的数据组成(N>=0),组成元组类型的数据可以称为“元素”二、元组的定义如:let position = (x:10.5,y:20) //两个元素的元组 let person = (name:"jack") //一个元素的元组 let data = () ...
分类:编程语言   时间:2015-03-30 23:02:54    阅读次数:213
最大流问题(Ford-Fulkerson算法)
最大流量问题      对于最大流量问题的详细分析和理论参见算法导论,Ford-Fulkerson算法,伪代码如下: Set Ftotal = 0 Repeat until there is no path from s to t:      Run DFS from s to find a flow path to t      Let cp be the minimum...
分类:编程语言   时间:2015-03-30 21:09:31    阅读次数:447
URAL - 1009 - K-based Numbers (简单DP)
1009. K-based Numbers Time limit: 1.0 second Memory limit: 64 MB Let’s consider K-based numbers, containing exactly N digits. We define a number to be valid if itsK-based notation doesn’t c...
分类:其他好文   时间:2015-03-30 09:30:12    阅读次数:116
HDU1245 Saving James Bond(最短路+简单几何)
Saving James Bond Time Limit: 6000/3000 MS (Java/Others)    Memory Limit: 65536/32768 K (Java/Others) Total Submission(s): 2405    Accepted Submission(s): 454 Problem Description This time let...
分类:其他好文   时间:2015-03-29 16:39:22    阅读次数:144
hdu1541 Stars 树状数组水题
Problem Description Astronomers often examine star maps where stars are represented by points on a plane and each star has Cartesian coordinates. Let the level of a star be an amount of the stars that are not higher and not to the right of the given star. ...
分类:编程语言   时间:2015-03-29 16:36:56    阅读次数:149
【SICP练习】140 练习3.71
练习3-71原文代码(define (Ramanujan s) (define (stream-cadr s) (stream-car (stream-cdr s))) (define (stream-cddr s) (stream-cdr (stream-cdr s))) (let ((scar (stream-car s))...
分类:其他好文   时间:2015-03-29 12:21:38    阅读次数:122
【SICP练习】139 练习3.70
练习3-70原文代码(define (merge-weighted s1 s2 weight) (cond ((stream-null? s1) s2) ((stream-null? s2) s1) (else (let ((cars1 (stream-car s1)) (cars2 (stream-car s2))) (cond (...
分类:其他好文   时间:2015-03-29 10:50:12    阅读次数:132
Java常见排序算法之归并排序
在学习算法的过程中,我们难免会接触很多和排序相关的算法。总而言之,对于任何编程人员来说,基本的排序算法是必须要掌握的。从今天开始,我们将要进行基本的排序算法的讲解。Are you ready?Let‘s go~~~1、排序算法的基本概念的讲解 时间复杂度:需要排序的的关键字的比较次数和相应的移动的....
分类:编程语言   时间:2015-03-28 12:56:53    阅读次数:180
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