You are given an array complexity of length n. There are n locked computers in a room with labels from 0 to n - 1, each with its own unique password. The password of the computer i has a complexity complexity[i]. The password for the computer labeled 0 is…

给你一个正整数 n，表示一个 n x n 的城市，同时给定一个二维数组 buildings，其中 buildings[i] = [x, y] 表示位于坐标 [x, y] 的一个 唯一 建筑。 如果一个建筑在四个方向（左、右、上、下）中每个方向上都至少存在一个建筑，则称该建筑 被覆盖 。 返回 被覆盖 的建筑数量。   示例 1： 输入: n = 3, buildings = [[1,2],[2,2],[3,2],[2,1],[2,3]] 输出: 1 解释:

You are given a positive integer n, representing an n x n city. You are also given a 2D grid buildings, where buildings[i] = [x, y] denotes a unique building located at coordinates [x, y]. A building is covered if there is at least one building in all four…

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:

给你三个长度为 n 的数组，分别描述 n 个优惠券的属性：code、businessLine 和 isActive。其中，第 i 个优惠券具有以下属性：

You are given three arrays of length n that describe the properties of n coupons: code, businessLine, and isActive. The ith coupon has:

给你一个整数数组 prices ，表示一支股票的历史每日股价，其中 prices[i] 是这支股票第 i 天的价格。 一个 平滑下降的阶段 定义为：对于 连续一天或者多天 ，每日股价都比 前一日股价恰好少 1 ，这个阶段第一天的股价没有限制。 请你返回 平滑下降阶段 的数目。   示例 1： 输入：prices = [3,2,1,4] 输出：7 解释：总共有 7 个平滑下降阶段： [3], [2], [1], [4], [3,2], [2,1] 和 [3,2,1] 注意，仅一天按照定义也是平滑下降阶段。…

You are given an integer array prices representing the daily price history of a stock, where prices[i] is the stock price on the ith day. A smooth descent period of a stock consists of one or more contiguous days such that the price on each day is lower than…

给你一个整数 n，表示公司中员工的数量。每位员工都分配了一个从 1 到 n 的唯一 ID ，其中员工 1 是 CEO。另给你两个下标从 1 开始的整数数组 present 和 future，两个数组的长度均为 n，具体定义如下：

You are given an integer n, representing the number of employees in a company. Each employee is assigned a unique ID from 1 to n, and employee 1 is the CEO. You are given two 1-based integer arrays, present and future, each of length n, where:

给你一个整数数组 prices，其中 prices[i] 是第 i 天股票的价格（美元），以及一个整数 k。 你最多可以进行 k 笔交易，每笔交易可以是以下任一类型：

You are given an integer array prices where prices[i] is the price of a stock in dollars on the ith day, and an integer k. You are allowed to make at most k transactions, where each transaction can be either of the following:

给你两个整数数组 prices 和 strategy，其中：