15332019张胜利-优快云博客

原创分而治之——找出第K大的数

问题描述： Find the kth largest element in an unsorted array. Note that it is the kth largest element in the sorted order, not the kth distinct element. Example 1: Input: [3,2,1,5,6,4] and k = 2 Output...

2018-09-16 14:39:19 376

示例： a=np.array([[1,2,3],[4,5,6]]) b=np.array([[11,21,31],[7,8,9]]) np.concatenate((a,b),axis=0) 结果： array([[ 1, 2, 3], [ 4, 5, 6], [11, 21, 31], [ 7, 8, 9]]) 示例： np.concatenate((a,b),axis=1) #axis=1表示对应行的数组进行拼接结果： ar

2021-01-21 15:42:02 206

原创将多变量时间序列插值变成相同长度

def transform_to_same_length(x, n_var, max_length): n = x.shape[0] # x的形状(n,var,length) # the new set in ucr form np array ucr_x = np.zeros((n, max_length, n_var), dtype=np.float64) # loop through each time series for i in range(.

2020-12-07 20:50:57 738

原创将序列转换为相同长度

def transform_to_same_length(x, n_var, max_length): n = x.shape[0] # the new set in ucr form np array ucr_x = np.zeros((n, max_length, n_var), dtype=np.float64) # loop through each time series for i in range(n): mts = x...

2020-11-23 19:27:04 609

原创利用np.stack()把不同1 channel的灰度图像合并为3 channel的RGB图

np.stack文档解释： Join a sequence of arrays along a new axis. Theaxisparameter specifies the index of the new axis in the dimensions of the result. For example, ifaxis=0it will be the first dimension and ifaxis=-1it will be the last dimension. 产生一个给...

2020-09-17 17:29:16 789

原创 x[:,:,None,:]-x[:,:,:,None]

x[:,:,None,:]-x[:,:,:,None] None相当于在数组中多加一个维度。输入： x = np.arange(24).reshape((2,3,4)) 输出： array([[[ 0, 1, 2, 3], [ 4, 5, 6, 7], [ 8, 9, 10, 11]], [[12, 13, 14, 15], [16, 17, 18, 19], [20, 21, 22, 23]]]) x

2020-09-16 21:29:21 5605

原创 Remove Element

问题描述： Given an array nums and a value val, remove all instances of that value in-place and return the new length. Do not allocate extra space for another array, you must do this by modifying the inp...

2018-12-29 21:21:41 165

原创 Search Insert Position

问题描述： Given a sorted array and a target value, return the index if the target is found. If not, return the index where it would be if it were inserted in order. You may assume no duplicates in the a...

2018-12-29 11:24:52 156

原创 Count and Say

问题描述： The count-and-say sequence is the sequence of integers with the first five terms as following: 1. 1 2. 11 3. 21 4. 1211 5. 111221 1 is read off as "one 1" or 11.11 is re...

2018-12-29 11:16:08 152

原创 Merge Two Sorted Lists

问题描述： Merge two sorted linked lists and return it as a new list. The new list should be made by splicing together the nodes of the first two lists. Example: Input: 1->2->4, 1->3->4 Out...

2018-12-29 10:57:37 139

原创 Remove Duplicates from Sorted Array

问题描述： Given a sorted array nums, remove the duplicates in-place such that each element appear only once and return the new length. Do not allocate extra space for another array, you must do this by ...

2018-12-29 10:45:43 142

原创 Implement strStr()

问题描述： Implement strStr(). Return the index of the first occurrence of needle in haystack, or -1 if needle is not part of haystack. Example 1: Input: haystack = "hello", needle = "ll" Output: 2 ...

2018-12-29 10:33:23 138

原创 Add Two Numbers

问题描述： 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 contain a single digit. Add the two numbers and r...

2018-12-29 10:23:55 147

原创 2018年百度之星资格赛总结及解析

参赛时间：2018年8月4日—2018年8月6日参赛队员：15332019张胜利 15332018张千艺目录 1、问题描述和解题思路 2、赛事总结及体会问题一：调查问卷度度熊为了完成毕业论文，需要收集一些数据来支撑他的论据，于是设计了一份包含 m 个问题的调查问卷，每个问题只有 'A' 和 'B' 两种选项。将问卷散发出去之后，...

2018-12-23 18:55:04 500

原创整数转罗马数字

问题描述： Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D ...

2018-12-02 22:52:22 156

原创 Longest Common Prefix

问题描述： Write a function to find the longest common prefix string amongst an array of strings. If there is no common prefix, return an empty string "". Example 1: Input: ["flower","flow","flight"] ...

2018-11-18 23:37:11 117

原创罗马数字转换

问题描述： Roman numerals are represented by seven different symbols: I, V, X, L, C, D and M. Symbol Value I 1 V 5 X 10 L 50 C 100 D ...

2018-11-11 23:31:09 740

原创反转数

问题描述： Given a 32-bit signed integer, reverse digits of an integer. Example 1: Input: 123 Output: 321 Example 2: Input: -123 Output: -321 Example 3: Input: 120 Output: 21 Note: Assume we ...

2018-11-11 23:26:16 197

原创 TWO Sum

问题描述： Given an array of integers, return indices of the two numbers such that they add up to a specific target. You may assume that each input would have exactly one solution, and you may not use th...

2018-10-28 21:18:49 138

原创平衡二叉树

Given a binary tree, determine if it is height-balanced. For this problem, a height-balanced binary tree is defined as: a binary tree in which the depth of the two subtrees of every node never differ by more than 1. Example 1: Given the following tree [3,9

2018-10-21 21:49:22 147

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