Implement int sqrt(int x). Compute and return the square root of x, where x is guaranteed to be a non-negative integer. Since the return type is an in ...
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其他好文 时间:
2018-10-14 19:02:20
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151
题目 Count the number of prime numbers less than a non negative number, n. Example: Input: 10 Output: 4 Explanation: There are 4 prime numbers less than ...
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其他好文 时间:
2018-10-12 13:54:06
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120
Given a non-negative integer N, find the largest number that is less than or equal to N with monotone increasing digits. (Recall that an integer has m ...
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其他好文 时间:
2018-10-11 23:44:51
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216
Find an element in hidden array There is an array of length N consisting of non-negative integers. The array is sorted in non-decreasing order. Each n ...
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其他好文 时间:
2018-10-07 23:29:53
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336
preprocess Logistic Regression LightGBM 1. 二分类 2.多分类 XGBoost 1. 二分类 处理正负样本不均匀的案例 主要思路 1. 手动调整正负样本比例 2. 过采样 Over Sampling 对训练集里面样本数量较少的类别(少数类)进行过采样,合成新 ...
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其他好文 时间:
2018-10-06 21:36:54
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291
zhuanzi:https://blog.csdn.net/u010223750/article/details/69948463 采样介绍 假如我们有一个多分类任务或者多标签分类任务,给定训练集(xi,Ti)(xi,Ti),其中xixi表示上下文,TiTi表示目标类别(可能有多个).可以用word ...
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其他好文 时间:
2018-10-06 18:36:06
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432
《LDA数学八卦》对于LDA的Gibbs Sampling求解讲得很详细,在此不在重复在轮子,直接贴上该文这部分内容。 Gibbs Sampling 批注: 1、 对于第i个词语,上式k(主题类型)未知,取值范围为[1, K],t(词语类型)已知,即观测值。 2、 由于doc-topic与topic ...
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其他好文 时间:
2018-10-06 13:16:07
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168
Given a non-negative index k where k ≤ 33, return the kth index row of the Pascal's triangle. Note that the row index starts from 0. Example: 原题地址: Pa ...
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编程语言 时间:
2018-10-05 17:21:25
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152
Given a non-empty array of digits representing a non-negative integer, plus one to the integer. The digits are stored such that the most significant d ...
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编程语言 时间:
2018-10-05 17:19:58
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157
Given a non negative integer num, repeatedly add all its digits until the result has only one digit. Example: Input: 38 Output: 2 Explanation: The pro ...
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其他好文 时间:
2018-10-05 13:55:26
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163