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Solution: Reverse String

Understand how to reverse a character array in place by using the two pointers technique. This lesson teaches you to swap elements from both ends moving inward without extra memory. Learn the step-by-step process and grasp the time and space efficiency of this approach.

Statement

You are given a character array, s, representing a string. Write a function that reverses the array in-place.

  • The reversal must be done by modifying the original array directly.

  • You cannot use extra memory beyond a constant amount O(1)O(1) ...