Daily Coding Problem: Problem #1646 [Medium]

Good morning! Here's your coding interview problem for today.

This problem was asked by Facebook.

Write a function that rotates a list by k elements. For example, [1, 2, 3, 4, 5, 6] rotated by two becomes [3, 4, 5, 6, 1, 2]. Try solving this without creating a copy of the list. How many swap or move operations do you need?

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