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刷题2. Add Two Numbers
一、题目要求 You are given two non empty linked lists representing two non negative integers. The digits are stored in reverse order and each of their nodes ...
分类:其他好文   时间:2020-01-23 12:26:54    阅读次数:77
[LC] 494. Target Sum
You are given a list of non-negative integers, a1, a2, ..., an, and a target, S. Now you have 2 symbols + and -. For each integer, you should choose o ...
分类:其他好文   时间:2020-01-20 09:38:14    阅读次数:92
I. Powers Of Two
I. Powers Of Two A positive integer xx is called a power of two if it can be represented as x=2yx=2y, where y is a non-negative integer. So, the power ...
分类:其他好文   时间:2020-01-18 12:25:52    阅读次数:97
1306. Jump Game III
Given an array of non-negative integers arr, you are initially positioned at start index of the array. When you are at index i, you can jump to i + ar ...
分类:其他好文   时间:2020-01-17 13:27:34    阅读次数:62
那些年踩过的坑
1.遇到这么个题目 Write a function, which takes a non negative integer (seconds) as input and returns the time in a human readable format (HH:MM:SS) HH = hour ...
分类:其他好文   时间:2020-01-16 23:54:38    阅读次数:159
[LeetCode] 64. Minimum Path Sum
Description Given a $m \times n$ grid filled with non negative numbers, find a path from top left to bottom right which minimizes the sum of all numbe ...
分类:其他好文   时间:2020-01-13 01:09:16    阅读次数:105
NMF: non-negative matrix factorization.
1. 矩阵分解可以用来解决什么方法, 以及how? 利用矩阵分解来解决实际问题的分析方法很多,如PCA(主成分分析)、ICA(独立成分分析)、SVD(奇异值分解)、VQ(矢量量化)等。在所有这些方法中,原始的大矩阵V被近似分解为低秩的V=WH形式。这些方法的共同特点是,因子W和H中的元素可为正或负, ...
分类:其他好文   时间:2020-01-10 22:12:43    阅读次数:95
【机器学习】性能评估指标
机器学习性能评估指标 TP、TN、FP、FN FN:False(假的) Negative(反例),模型判断样本为负例,但模型判断错了,事实上是正样本。(漏报率)FP:False(假的) Positive(正例),模型判断样本为正例,但模型判断错了,事实上是负样本。(误报率)TN:True(真的) N ...
分类:其他好文   时间:2020-01-10 01:13:59    阅读次数:125
LeetCode #275 H-Index II
Question Given an array of citations sorted in ascending order (each citation is a non-negative integer) of a researcher, write a function to compute ...
分类:其他好文   时间:2020-01-10 00:53:46    阅读次数:74
LeetCode #274 H-Index
Question Given an array of citations (each citation is a non-negative integer) of a researcher, write a function to compute the researcher's h-index. ...
分类:其他好文   时间:2020-01-10 00:43:41    阅读次数:76
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