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原创 数据仓库Build The Data Warehouse（William H.Inmon）学习笔记目录
Inmon是经典的范式建模大师，该笔记目录是数据仓库Build The Data Warehouse（William H.Inmon）的学习笔记，内容包含书内的经典干货、随手结合实际经验的笔记心得；有相关的数据仓库建模问题可以私聊我讨论，互相学习！--- 文章持续更新中！---第一章数据仓库Build The Data Warehouse（William H.Inmon）学习笔记 --- 第一章、决策支持系统的发展第二章数据仓库Build The Data W...
2020-07-16 15:44:41
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原创 设计模式学习笔记汇总目录
这里的的学习笔记包含JavaSE和J2EE两部分，持续更新中！其中关于学习的参考资料如下：1.菜鸟设计模式2.Head First Design Patterns（书、强烈推荐）;3.大话设计模式（书、适合入门）；相关的代码下载：GitHub源码设计模式学习笔记 --- 1.简单工厂模式 设计模式学习笔记 --- 2.抽象工厂模式 设计模式学习笔记 --- 3.单...
2020-04-28 21:08:53
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原创 大数据之路、阿里巴巴大数据实践读书笔记目录
该系列持续更新中：第一章：大数据之路、阿里巴巴大数据实践读书笔记 --- 第一章、总述第二章：大数据之路、阿里巴巴大数据实践读书笔记 --- 第二章、日志采集第三章：大数据之路、阿里巴巴大数据实践读书笔记 --- 第三章、数据同步...
2020-01-12 02:09:19
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原创 送给订阅我专栏同学们一封信
非常感谢大家来订阅我的专栏，最早开始写博客是由于为了记笔记，大学时期打ACM，玩C/C++,毕业之后从事大数据 + 机器学习。后来逐渐变成了把自己做过的每一次项目实战的问题，技术调研、开发技能等都记录下来，到现在形成了简单的部分规模专栏。因此大家在看的时候有些文章可能不太具体，但是我会为订阅同学提供好服务。订阅的同学如果对我的文章或者某些技术问题感兴趣或者不懂得，可以私信问...
2020-01-05 19:55:40
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原创 LeetCode --- 2068. Check Whether Two Strings are Almost Equivalent 解题报告
Two strings and are considered almost equivalent if the differences between the frequencies of each letter from to between and is at most .Given two strings and , each of length , return if and are almost equivalent, or otherwise.The frequency o
2024-03-16 14:16:31
104
原创 LeetCode --- 2062. Count Vowel Substrings of a String 解题报告
A substring is a contiguous (non-empty) sequence of characters within a string.A vowel substring is a substring that only consists of vowels (, , , , and ) and has all five vowels present in it.Given a string , return the number of vowel substrings in .Exa
2024-03-14 08:08:23
95
原创 LeetCode --- 2057. Smallest Index With Equal Value 解题报告
Given a 0-indexed integer array , return the smallest index of such that , or if such index does not exist. denotes the remainder when is divided by .Example 1:Input: nums = [0,1,2]Output: 0Explanation: i=0: 0 mod 10 = 0 == nums[0].i=1: 1 mod 10 =
2024-03-14 07:48:04
151
原创 LeetCode --- 2053. Kth Distinct String in an Array 解题报告
A distinct string is a string that is present only once in an array.Given an array of strings , and an integer , return the distinct string present in . If there are fewer than distinct strings, return an empty string .Note that the strings are considere
2024-03-05 07:35:58
90
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原创 LeetCode --- 2047. Number of Valid Words in a Sentence 解题报告
LeetCode --- 2047. Number of Valid Words in a Sentence 解题报告
2024-02-17 03:18:58
233
原创 LeetCode --- 2042. Check if Numbers Are Ascending in a Sentence 解题报告
A sentence is a list of tokens separated by a single space with no leading or trailing spaces. Every token is either a positive number consisting of digits with no leading zeros, or a word consisting of lowercase English letters.Given a string representi
2024-02-02 00:14:14
98
原创 LeetCode --- 2037. Minimum Number of Moves to Seat Everyone 解题报告
There are seats and students in a room. You are given an array of length , where is the position of the seat. You are also given the array of length , where is the position of the student.You may perform the following move any number of times:Retur
2024-02-01 23:58:54
227
原创 LeetCode --- 2032. Two Out of Three 解题报告
Given three integer arrays , , and , return a distinct array containing all the values that are present in at least two out of the three arrays. You may return the values in any order.Example 1:Input: nums1 = [1,1,3,2], nums2 = [2,3], nums3 = [3]Output:
2024-01-31 22:04:24
153
原创 LeetCode --- 2027. Minimum Moves to Convert String 解题报告
You are given a string consisting of characters which are either or .A move is defined as selecting three consecutive characters of and converting them to . Note that if a move is applied to the character , it will stay the same.Return the minimum numb
2024-01-31 21:45:47
134
原创 LeetCode --- CodeTestcaseTest ResultTest Result2022. Convert 1D Array Into 2D Array 解题报告
模拟操作，给定一个一位数组，利用规律使其变为二维数组。这里就通过盘点给定一位数组的长度是否等于m*n直接判断是否可变换。然后通过两个for遍历赋值即可
2024-01-19 01:58:54
36
原创 LeetCode --- 2016. Maximum Difference Between Increasing Elements 解题报告
LeetCode升序求差值
2024-01-15 01:56:58
113
原创 LeetCode --- 2011. Final Value of Variable After Performing Operations 解题报告
There is a programming language with only four operations and one variable :Initially, the value of is .Given an array of strings containing a list of operations, return the final value of after performing all the operations.Example 1:Input: operations
2023-12-10 23:55:52
142
原创 LeetCode --- 2006. Count Number of Pairs With Absolute Difference K 解题报告
Given an integer array and an integer , return the number of pairs where such that .The value of is defined as:Example 1:Input: nums = [1,2,2,1], k = 1Output: 4Explanation: The pairs with an absolute difference of 1 are:- [1,2,2,1]- [1,2,2,1]- [1
2023-12-10 23:44:34
129
原创 LeetCode --- 2000. Reverse Prefix of Word 解题报告
Given a 0-indexed string and a character , reverse the segment of that starts at index and ends at the index of the first occurrence of (inclusive). If the character does not exist in , do nothing.Return the resulting string.Example 1:Input: word = &
2023-12-03 12:20:01
207
原创 LeetCode --- CodeTestcaseTestcaseTest Result1991. Find the Middle Index in Array 解题报告
Given a 0-indexed integer array , find the leftmost (i.e., the smallest amongst all the possible ones).A is an index where .If , the left side sum is considered to be . Similarly, if , the right side sum is considered to be .Return the leftmost that sat
2023-11-05 23:27:30
93
原创 LeetCode --- 1984. Minimum Difference Between Highest and Lowest of K Scores 解题报告
You are given a 0-indexed integer array , where represents the score of the student. You are also given an integer .Pick the scores of any students from the array so that the difference between the highest and the lowest of the scores is minimized.Retu
2023-11-03 08:48:14
75
原创 LeetCode --- 1979. Find Greatest Common Divisor of Array 解题报告
Given an integer array , return the greatest common divisor of the smallest number and largest number in .The greatest common divisor of two numbers is the largest positive integer that evenly divides both numbers.Example 1:Input: nums = [2,5,6,9,10]Outp
2023-10-23 00:18:16
242
原创 LeetCode --- 1974. Minimum Time to Type Word Using Special Typewriter 解题报告
There is a special typewriter with lowercase English letters to arranged in a circle with a pointer. A character can only be typed if the pointer is pointing to that character. The pointer is initially pointing to the character .Each second, you may perf
2023-10-20 00:12:17
580
原创 LeetCode --- 1967. Number of Strings That Appear as Substrings in Word 解题报告
Given an array of strings and a string , return the number of strings in that exist as a substring in .A substring is a contiguous sequence of characters within a string.Example 1:Input: patterns = ["a","abc","bc","d&q
2023-09-25 01:06:53
470
原创 LeetCode --- 1961. Check If String Is a Prefix of Array 解题报告
Given a string and an array of strings , determine whether is a prefix string of .A string is a prefix string of if can be made by concatenating the first strings in for some positive no larger than .Return if is a prefix string of , or otherwis
2023-09-25 00:51:33
280
原创 LeetCode --- 1957. Delete Characters to Make Fancy String 解题报告
A fancy string is a string where no three consecutive characters are equal.Given a string , delete the minimum possible number of characters from to make it fancy.Return the final string after the deletion. It can be shown that the answer will always be u
2023-09-24 10:55:41
130
原创 LeetCode --- 1952. Three Divisors 解题报告
Given an integer , return if has exactly three positive divisors. Otherwise, return .An integer is a divisor of if there exists an integer such that .Example 1:Input: n = 2Output: falseExplantion: 2 has only two divisors: 1 and 2.Example 2:Inpu
2023-09-24 10:33:02
115
原创 LeetCode --- 222. Count Complete Tree Nodes 解题报告
Given the of a complete binary tree, return the number of the nodes in the tree.According to Wikipedia, every level, except possibly the last, is completely filled in a complete binary tree, and all nodes in the last level are as far left as possible. It
2023-09-23 20:10:58
203
原创 LeetCode --- 145. Binary Tree Postorder Traversal 解题报告
Given the of a binary tree, return the postorder traversal of its nodes' values.Example 1:Input: root = [1,null,2,3]Output: [3,2,1]Example 2:Input: root = []Output: []Example 3:Input: root = [1]Output: [1]Constraints:Follow up: Recursive so
2023-09-23 19:34:38
124
原创 LeetCode --- 1945. Sum of Digits of String After Convert 解题报告
You are given a string consisting of lowercase English letters, and an integer .First, convert into an integer by replacing each letter with its position in the alphabet (i.e., replace with , with , ..., with ). Then, transform the integer by replacin
2023-09-23 16:58:28
135
原创 LeetCode --- 1941. Check if All Characters Have Equal Number of Occurrences 解题报告
Given a string , return if is a good string, or otherwise.A string is good if all the characters that appear in have the same number of occurrences (i.e., the same frequency).Example 1:Input: s = "abacbc"Output: trueExplanation: The chara
2023-09-23 02:36:32
65
原创 LeetCode --- 1935. Maximum Number of Words You Can Type 解题报告
There is a malfunctioning keyboard where some letter keys do not work. All other keys on the keyboard work properly.Given a string of words separated by a single space (no leading or trailing spaces) and a string of all distinct letter keys that are brok
2023-09-10 10:58:05
550
原创 LeetCode --- 1929. Concatenation of Array 解题报告
Given an integer array of length , you want to create an array of length where and for (0-indexed).Specifically, is the concatenation of two arrays.Return the array .Example 1:Input: nums = [1,2,1]Output: [1,2,1,1,2,1]Explanation: The array ans
2023-09-10 10:39:15
315
原创 LeetCode --- 1925. Count Square Sum Triples 解题报告
A square triple is a triple where , , and are integers and .Given an integer , return the number of square triples such that .Example 1:Input: n = 5Output: 2Explanation: The square triples are (3,4,5) and (4,3,5).Example 2:Input: n = 10Output: 4
2023-09-05 01:59:00
285
原创 LeetCode --- 1920. Build Array from Permutation 解题报告
Given a zero-based permutation (0-indexed), build an array of the same length where for each and return it.A zero-based permutation is an array of distinct integers from to (inclusive).Example 1:Input: nums = [0,2,1,5,3,4]Output: [0,1,2,4,5,3]Exp
2023-09-05 01:36:23
286
原创 LeetCode --- 1913. Maximum Product Difference Between Two Pairs 解题报告
The product difference between two pairs and is defined as .Given an integer array , choose four distinct indices , , , and such that the product difference between pairs and is maximized.Return the maximum such product difference.Example 1:Input: nu
2023-09-03 03:07:36
386
原创 LeetCode --- 1909. Remove One Element to Make the Array Strictly Increasing 解题报告
Given a 0-indexed integer array , return if it can be made strictly increasing after removing exactly one element, or otherwise. If the array is already strictly increasing, return .The array is strictly increasing if for each index Example 1:Input: n
2023-09-03 02:40:04
130
原创 LeetCode --- 1903. Largest Odd Number in String 解题报告
You are given a string , representing a large integer. Return the largest-valued odd integer (as a string) that is a non-empty substring of , or an empty string if no odd integer exists.A substring is a contiguous sequence of characters within a string.Ex
2023-08-29 08:10:53
329
原创 LeetCode --- 1897. Redistribute Characters to Make All Strings Equal 解题报告
You are given an array of strings (0-indexed).In one operation, pick two distinct indices and , where is a non-empty string, and move any character from to any position in .Return if you can make every string in equal using any number of operations,
2023-08-21 00:42:42
606
深入浅出Otter与Canal.pdf
2020-02-29
weworkapi_python-master.zip
2020-01-20
技术调研_数据质量管理&性能量化&多维分析 .pdf
2019-11-18
Cloudera Manager-V5.13 元数据库梳理.pdf
2019-10-30
基础算法-LP算法_线性规划问题.pptx
2019-10-17
基础算法-递归-杨鑫20191010.pptx
2019-10-17
基础算法 - 动态规划-2019-08-01.pptx
2019-10-17
Confluence-5.6.6-language-pack-zh_CN.jar
2018-09-30
Goods: Organizing Google’s Datasets
2018-09-06
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