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Solution Review: Rotating an Array by k Positions

Understand how to rotate an array by k positions using Go by applying a three-step reversal method. Learn to implement this algorithm efficiently with O(n) time complexity. This lesson guides you through reversing subarrays and the entire array to achieve the desired rotation, enhancing your skills in array manipulation and algorithm design in Go.

Solution

The following algorithm is applied to solve the problem:

  • In the first part, we reverse the elements from index 0 to k-1. Then we reverse the elements from k to n-1.

  • For example, for k=2 and input array 1, 2, 3, 4, 5, 6, the input array will be converted into 2, 1, 6, ...