Solving Rotate Array using Reversal.

Problem

Rotate array k steps.

Pattern

This problem demonstrates the Reversal pattern.

Approach

Reverse entire array, then reverse segments.

Solution 

  // Solution for Rotate Array
// Pattern: Reversal
// O(n) time

Complexity

O(n) time

Best Practices

  • Identify the pattern before coding — pattern recognition saves time
  • Handle edge cases: empty input, single element, duplicates
  • Use descriptive variable names even in timed interviews
  • Test with the provided examples plus one custom case