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Python更多控制流工具(二)
4.6. Defining FunctionsWe can create a function that writes the Fibonacci series to an arbitrary boundary:我们创建一个斐波那契数列的函数:>>> def fib(n): # write F...
分类:编程语言   时间:2015-03-14 21:40:04    阅读次数:586
Codeforces Hello2015第一题Cursed Query
英文题面: De Prezer loves movies and series. He has watched the Troy for like 100 times and also he is a big fan of Supernatural series.So, he did some researches and found a cursed object which had n...
分类:其他好文   时间:2015-03-14 15:26:11    阅读次数:163
[LeetCode]Repeated DNA Sequences,解题报告
目录目录 前言 题目 Native思路 二进制思路 AC前言最近在LeetCode上能一次AC的概率越来越低了,我这里也是把每次不能一次AC的题目记录下来,把解题思路分享给大家。题目All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: “ACGAATTCCG”. When...
分类:其他好文   时间:2015-03-14 12:30:04    阅读次数:201
[LeetCode]Repeated DNA Sequences
All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to identify repeated sequences within the DNA. Wri...
分类:其他好文   时间:2015-03-13 12:48:59    阅读次数:170
用R分析时间序列(time series)数据
时间序列 time series分析。用R语言实现。
分类:其他好文   时间:2015-03-11 12:28:46    阅读次数:139
数学之路-python数据处理(1)
Pandas基础import pandas aspdimport numpy as np#数字序列myseries=pd.Series([1,3,5,np.nan,6,8])print myseries#日期序列mydate=pd.date_range('20150101',periods=42)print mydate生成序列结果如下:0    11    32    53  NaN4    6...
分类:编程语言   时间:2015-03-09 12:52:54    阅读次数:228
[LeetCode] Repeated DNA Sequences
All DNA is composed of a series of nucleotides abbreviated as A, C, G, and T, for example: "ACGAATTCCG". When studying DNA, it is sometimes useful to ...
分类:其他好文   时间:2015-03-07 22:29:54    阅读次数:129
UVa 10253 (组合数 递推) Series-Parallel Networks
《训练之南》上的例题难度真心不小,勉强能看懂解析,其思路实在是意想不到。题目虽然说得千奇百怪,但最终还是要转化成我们熟悉的东西。经过书上的神分析,最终将所求变为:共n个叶子,每个非叶节点至少有两个子节点的 树的个数f(n)。最终输出2 × f(n)首先可以枚举一下根节点的子树的叶子个数,对于有i个叶...
分类:Web程序   时间:2015-03-07 11:25:46    阅读次数:213
SPOJ Problem 11063:AP - Complete The Series (Easy)
已知数列的第三项,最后第三项和数列的和,求这个数列sum=(a1+an)*n/2=(a3+a(n-3))/2,所以可以知道n.又(a(n-3)-a3)/(n-5)=d,那么就可以得到数列了。#include#includeint t,i;long long n,sum,a,b,d,fi;int ma...
分类:其他好文   时间:2015-03-07 11:18:58    阅读次数:114
1052. Linked List Sorting
A linked list consists of a series of structures, which are not necessarily adjacent in memory. We assume that each structure contains an integer key and a Next pointer to the next structure. Now give...
分类:其他好文   时间:2015-03-06 15:58:03    阅读次数:163
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