You are given an integer array nums. A special triplet is defined as a triplet of indices (i, j, k) such that:

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: