数据类型 框架示意图如下： graph TD data[数据类型] --- primitive[基本数据类型]; data --- reference[引用数据类型]; %% primitive primitive --- N[数值型]; primitive --- C[字符型]; primitive --- B[布尔型]; %% ...

题目概述 Leetcode 2742 You are given two 0-indexed integer arrays, cost and time, of size n representing the costs and the time taken to paint n different walls respectively. There are two painters a...

题目概述 Leetcode 1926 You are given an m x n matrix maze (0-indexed) with empty cells (represented as '.') and walls (represented as '+'). You are also given the entrance of the maze, where entrance...

题目概述 Leetcode 72 Given two strings word1 and word2, return the minimum number of operations required to convert word1 to word2. You have the following three operations permitted on a word: In...

题目概述 Leetcode 343 Given an integer n, break it into the sum of k positive integers, where k >= 2, and maximize the product of those integers. Return the maximum product you can get. C...

题目概述 Leetcode 790 You have two types of tiles: a 2 x 1 domino shape and a tromino shape. You may rotate these shapes. Given an integer n, return the number of ways to tile an 2 x n board...

合宿旅行路线 URL：合宿路线 日程安排 时间: 2023.9.9 ~ 2024.9.10 Day1 予定 当日 内容 関連リンク 9:00 9:00 東京駅丸の内ビルディング前　集合   9:1...

题目概述 Leetcode 74 You are given an m x n integer matrix matrix with the following two properties: Each row is sorted in non-decreasing order. The first integer of each row is greater than th...

Git指令 创建仓库 初始化本地仓库 根据自己的需要进入对应的目录下初始化一个本地仓库 git init 克隆远程仓库 克隆一个已存在的远程仓库 git clone <remote_repo_URL> 基本配置 设置用户名和邮箱地址（...

概念准备 在进行矩阵求导之前，我们首先需要做一些关于概念上的铺垫。主要分为以下两个部分： 函数与变元的种类 分子布局与分母布局 函数与变元的种类 这里的种类指的就是标量、向量和矩阵这三种。在本文后续内容中对于这三种形式的符号表达都遵循如下定义: 标量，用正文字体小写字母表示，例如： \(x, y\) 向量，用粗体小写字母表示，例如： \(\...