| from typing import List | |
| class Solution: | |
| def rotate(self, nums: List[int], k: int) -> None: | |
| """ | |
| Do not return anything, modify nums in-place instead. | |
| """ | |
| def reverse(arr: List[int], start: int, end: int): | |
| while start < end: | |
| arr[start], arr[end] = arr[end], arr[start] | |
| start += 1 | |
| end -= 1 | |
| n = len(nums) | |
| k = k % n | |
| reverse(nums, 0, n - 1) | |
| reverse(nums, 0, k - 1) | |
| reverse(nums, k, n - 1) | |