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[LeetCode] 23. Merge k Sorted Lists
合并K个有序链表。题目即是题意,例子, Example: Input: [ 1->4->5, 1->3->4, 2->6 ] Output: 1->1->2->3->4->4->5->6 这个题的最优解应该是用priority queue解决但是因为JS实现PQ太过麻烦,所以我这里给出次优解,用21 ...
分类:其他好文   时间:2020-01-29 10:48:10    阅读次数:84
1329. Sort the Matrix Diagonally
Given a m * n matrix mat of integers, sort it diagonally in ascending order from the top-left to the bottom-right then return the sorted array. Exampl ...
分类:其他好文   时间:2020-01-29 10:17:46    阅读次数:61
[Leetcode]653.Two Sum IV - Input is a BST
链接: "LeetCode653" 给定一个二叉搜索树和一个目标结果,如果 BST 中存在两个元素且它们的和等于给定的目标结果,则返回 true。 相关标签: 哈希表 类似于求两数之和,我们只需要在遍历二叉树过程中寻找是否存在有数为k 已经遍历到的数即可。 代码如下: python: C++: ...
分类:其他好文   时间:2020-01-28 22:58:39    阅读次数:75
PAT Advanced 1050 String Subtraction (20) [Hash散列]
题目 Given two strings S1 and S2, S = S1 – S2 is defined to be the remaining string afer taking all the characters in S2 from S1. Your task is simply to ...
分类:其他好文   时间:2020-01-28 21:02:59    阅读次数:65
240. Search a 2D Matrix II
Write an efficient algorithm that searches for a value in an m x n matrix. This matrix has the following properties: Integers in each row are sorted i ...
分类:其他好文   时间:2020-01-28 17:32:43    阅读次数:88
Redis系列-存储篇sorted set主要操作命令
Redis系列 存储篇sorted set主要操作函数小结 redis支持有序集合,即sorted set。sorted set在set的基础上,增加了排序属性,是set的升级版。这里简要谈谈sorted set的常用函数: 1)insert a)zadd 2)select a)zrange b)z ...
分类:其他好文   时间:2020-01-28 13:58:40    阅读次数:73
PP: UMAP: uniform manifold approximation and projection for dimension reduction
From Tutte institute for mathematics and computing Problem: dimension reduction Theoretical foundations: Methodology: Two phases. In the first phase, ...
分类:移动开发   时间:2020-01-27 23:45:17    阅读次数:134
leetcode 1 Two Sum
题目内容 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 ha ...
分类:其他好文   时间:2020-01-27 19:08:41    阅读次数:65
【leetcode】1329. Sort the Matrix Diagonally
题目如下: Given a m * n matrix mat of integers, sort it diagonally in ascending order from the top-left to the bottom-right then return the sorted array. ...
分类:其他好文   时间:2020-01-27 19:06:23    阅读次数:72
【leetcode】1331. Rank Transform of an Array
题目如下: Given an array of integers arr, replace each element with its rank. The rank represents how large the element is. The rank has the following rul ...
分类:其他好文   时间:2020-01-27 19:03:33    阅读次数:71
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