给你两个长度分别为 n 和 m 的整数数组 skill 和 mana 。

You are given two integer arrays, skill and mana, of length n and m, respectively. In a laboratory, n wizards must brew m potions in order. Each potion has a mana capacity mana[j] and must pass through all the wizards sequentially to be brewed properly. The…

存在一种仅支持 4 种操作和 1 个变量 X 的编程语言：

There is a programming language with only four operations and one variable X:

给你一个由数字组成的字符串 s 。重复执行以下操作，直到字符串恰好包含 两个 数字：

You are given a string s consisting of digits. Perform the following operation repeatedly until the string has exactly two digits:

你的任务是为一个很受欢迎的银行设计一款程序，以自动化执行所有传入的交易（转账，存款和取款）。银行共有 n 个账户，编号从 1 到 n 。每个账号的初始余额存储在一个下标从 0 开始的整数数组 balance 中，其中第 (i + 1) 个账户的初始余额是 balance[i] 。 请你执行所有 有效的 交易。如果满足下面全部条件，则交易 有效 ：

You have been tasked with writing a program for a popular bank that will automate all its incoming transactions (transfer, deposit, and withdraw). The bank has n accounts numbered from 1 to n. The initial balance of each account is stored in a 0-indexed integer…

给你一个整数数组 nums 。 开始时，选择一个满足 nums[curr] == 0 的起始位置 curr ，并选择一个移动 方向 ：向左或者向右。 此后，你需要重复下面的过程：

You are given an integer array nums. Start by selecting a starting position curr such that nums[curr] == 0, and choose a movement direction of either left or right. After that, you repeat the following process:

给你两个整数 m 和 n 表示一个下标从 0 开始的 m x n 网格图。同时给你两个二维整数数组 guards 和 walls ，其中 guards[i] = [rowi, coli] 且 walls[j] = [rowj, colj] ，分别表示第 i 个警卫和第 j 座墙所在的位置。 一个警卫能看到 4 个坐标轴方向（即东、南、西、北）的 所有 格子，除非他们被一座墙或者另外一个警卫 挡住 了视线。如果一个格子能被 至少 一个警卫看到，那么我们说这个格子被 保卫 了。 请你返回空格子中，有多少个格子是…

You are given two integers m and n representing a 0-indexed m x n grid. You are also given two 2D integer arrays guards and walls where guards[i] = [rowi, coli] and walls[j] = [rowj, colj] represent the positions of the ith guard and jth wall respectively.…

给你两个 非负 整数 num1 和 num2 。 每一步 操作 中，如果 num1 >= num2 ，你必须用 num1 减 num2 ；否则，你必须用 num2 减 num1 。

You are given two non-negative integers num1 and num2. In one operation, if num1 >= num2, you must subtract num2 from num1, otherwise subtract num1 from num2.

给你一个整数数组 nums ，另给你一个整数 original ，这是需要在 nums 中搜索的第一个数字。 接下来，你需要按下述步骤操作：

You are given an array of integers nums. You are also given an integer original which is the first number that needs to be searched for in nums. You then do the following steps:

在一条无限长的公路上有 n 辆汽车正在行驶。汽车按从左到右的顺序按从 0 到 n - 1 编号，每辆车都在一个 独特的 位置。 给你一个下标从 0 开始的字符串 directions ，长度为 n 。directions[i] 可以是 'L'、'R' 或 'S' 分别表示第 i 辆车是向 左 、向 右 或者 停留 在当前位置。每辆车移动时 速度相同 。 碰撞次数可以按下述方式计算：

There are n cars on an infinitely long road. The cars are numbered from 0 to n - 1 from left to right and each car is present at a unique point. You are given a 0-indexed string directions of length n. directions[i] can be either 'L', 'R', or 'S' denoting…

给你一个整数 numberOfUsers 表示用户总数，另有一个大小为 n x 3 的数组 events 。 每个 events[i] 都属于下述两种类型之一：

You are given an integer numberOfUsers representing the total number of users and an array events of size n x 3. Each events[i] can be either of the following two types: