给定一个长度为 n 的整数数组 nums 。 假设 arrk 是数组 nums 顺时针旋转 k 个位置后的数组，我们定义 nums 的 旋转函数  F 为：

You are given an integer array nums of length n. Assume arrk to be an array obtained by rotating nums by k positions clock-wise. We define the rotation function F on nums as follow:

给定一个 n × n 的二维矩阵 matrix 表示一个图像。请你将图像顺时针旋转 90 度。 你必须在 原地 旋转图像，这意味着你需要直接修改输入的二维矩阵。请不要 使用另一个矩阵来旋转图像。   示例 1： 输入：matrix = [[1,2,3],[4,5,6],[7,8,9]] 输出：[[7,4,1],[8,5,2],[9,6,3]] 示例 2： 输入：matrix = [[5,1,9,11],[2,4,8,10],[13,3,6,7],[15,14,12,16]] 输出：[[15,13,2,5]…

You are given an n x n 2D matrix representing an image, rotate the image by 90 degrees (clockwise). You have to rotate the image in-place, which means you have to modify the input 2D matrix directly. DO NOT allocate another 2D matrix and do the rotation.…

给你一个 m x n 的字符矩阵 boxGrid ，它表示一个箱子的侧视图。箱子的每一个格子可能为：

You are given an m x n matrix of characters boxGrid representing a side-view of a box. Each cell of the box is one of the following:

给你一个整数数组 nums。

You are given an integer array nums. From any index i, you can jump to another index j under the following rules:

给你一个长度为 n 的整数数组 nums。

You are given an integer array nums of length n. You start at index 0, and your goal is to reach index n - 1. From any index i, you may perform one of the following operations: