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[LeetCode] Degree of an Array
Given a non-empty array of non-negative integers nums, the degree of this array is defined as the maximum frequency of any one of its elements. Your t ...
分类:其他好文   时间:2017-10-16 19:39:41    阅读次数:142
茎叶图
销售额 Stem-and-Leaf Plot Frequency Stem & Leaf 2.00 16 . 17 4.00 17 . 1222 7.00 18 . 1136788 17.00 19 . 11234566667889999 27.00 20 . 0000123333344555666 ...
分类:其他好文   时间:2017-10-15 22:32:30    阅读次数:235
UVa 11248 Frequency Hopping (网络流)
题意:给定上一个网络,每个边有一个容量,问你能不能从 1 到 n,使得流量为 c,如果不能,那么是不是可以修改一条边,使得达到。 析:背景就是一个网络流,如果原图能跑出来,那么就不用了,就肯定能达到,如果不能,那么修改的边肯定是最小割里的边,那么就枚举这最小割里的边,这样可能会超时,所以就优化,其中 ...
分类:其他好文   时间:2017-10-13 21:13:51    阅读次数:184
茎叶图
销售额 Stem-and-Leaf Plot Frequency Stem & Leaf 2.00 16 . 17 4.00 17 . 1222 7.00 18 . 1136788 17.00 19 . 11234566667889999 27.00 20 . 0000123333344555666 ...
分类:其他好文   时间:2017-10-11 23:57:59    阅读次数:366
茎叶图
销售额 Stem-and-Leaf Plot Frequency Stem & Leaf 2.00 16 . 17 4.00 17 . 1222 7.00 18 . 1136788 17.00 19 . 11234566667889999 27.00 20 . 0000123333344555666 ...
分类:其他好文   时间:2017-10-11 21:55:37    阅读次数:143
[Javascript] Identify the most important words in a document using tf-idf in Natural
Tf-idf, or term frequency-inverse document frequency, is a statistic that indicates how important a word is to the entire document. This lesson will e ...
分类:编程语言   时间:2017-10-03 21:11:33    阅读次数:134
TF-IDF及其算法
TF-IDF及其算法 概念 TF-IDF(term frequency–inverse document frequency)是一种用于资讯检索与资讯探勘的常用加权技术。TF-IDF是一种统计方法,用以评估一字词对于一个文件集或一个语料库中的其中一份文件的重要程度。字词的重要性随着它在文件中出现的次 ...
分类:编程语言   时间:2017-09-27 13:11:32    阅读次数:197
451. Sort Characters By Frequency
Example 2: Example 3: The logic is very similar to NO.347 and here we just use a map a count and according to the frequency to put it into the right b ...
分类:其他好文   时间:2017-09-23 13:41:51    阅读次数:186
CDMA与OFDM
OFDM —— OFDM(Orthogonal Frequency Division Multiplexing)即正交频分复用技术,实际上OFDM是MCM Multi-CarrierModulation,多载波调制的一种。其主要思想是:将信道分成若干正交子信道,将高速数据信号转换成并行的低速子数据流 ...
分类:其他好文   时间:2017-09-22 12:06:36    阅读次数:180
508. Most Frequent Subtree Sum (Medium)
Given the root of a tree, you are asked to find the most frequent subtree sum. The subtree sum of a node is defined as the sum of all the node values ...
分类:其他好文   时间:2017-09-20 21:54:53    阅读次数:123
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