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Learn Data Structures and Algorithms in Java

Problem: Reverse String

Explore how to reverse an array of characters in place using recursion. Learn to implement a recursive helper function that swaps elements from the edges inward, modifying the input array directly without extra memory allocation. Understand the approach’s time and space complexity for efficient coding.

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Statement

Given an array of characters s, write a function to reverse the array in place.

The reversal must be performed by modifying the input array s directly, using only O(1)O(1) extra memory.

Note: Do not return a new array. Modify the input array s in place.

Constraints:

  • 1≤1 \leq s.length ≤105\leq 10^5 ...