You are given two categories of theme park attractions: land rides and water rides.

给你两种类别的游乐园项目：陆地游乐设施 和 水上游乐设施。

You are given two categories of theme park attractions: land rides and water rides.

给你两个整数 num1 和 num2，表示一个 闭 区间 [num1, num2]。

You are given two integers num1 and num2 representing an inclusive range [num1, num2]. The waviness of a number is defined as the total count of its peaks and valleys:

给你一个下标从 0 开始的长度为 n 的整数数组 nums。 定义两个数组 leftSum 和 rightSum，其中：

You are given a 0-indexed integer array nums of size n. Define two arrays leftSum and rightSum where:

给你一个二维整数数组 descriptions ，其中 descriptions[i] = [parenti, childi, isLefti] 表示 parenti 是 childi 在 二叉树 中的 父节点，二叉树中各节点的值 互不相同 。此外：