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推廣網站開發,包含 Laravel 和 Kotlin 後端撰寫、自動化測試、讀書心得等。Taiwan Kotlin User Group 管理員。

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Hi, here’s your problem today. This problem was recently asked by Facebook:

Given an array and an integer k, rotate the array by k spaces. Do this without generating a new array and without using extra space.

Here’s an example and some starter code

def rotate_list(nums, k):
  # Fill this in.

a = [1, 2, 3, 4, 5]
rotate_list(a, 2)
# [3, 4, 5, 1, 2]