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 ...
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其他好文 时间:
2020-01-23 12:26:54
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77
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 ...
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其他好文 时间:
2020-01-20 09:38:14
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92
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 ...
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其他好文 时间:
2020-01-18 12:25:52
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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 ...
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其他好文 时间:
2020-01-17 13:27:34
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62
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 ...
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其他好文 时间:
2020-01-16 23:54:38
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159
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 ...
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其他好文 时间:
2020-01-13 01:09:16
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105
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, ...
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其他好文 时间:
2020-01-10 22:12:43
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95
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 ...
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其他好文 时间:
2020-01-10 01:13:59
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125
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 ...
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其他好文 时间:
2020-01-10 00:53:46
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74
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. ...
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其他好文 时间:
2020-01-10 00:43:41
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76