Easy
Quiz
#344 Reverse String
APPROACH
Reverse the character array s in-place, swapping characters from both ends toward the center, using only O(1) additional memory.
Example 1:
Input: s = ["h","e","l","l","o"]
Output: ["o","l","l","e","h"]
Example 2:
Input: s = ["H","a","n","n","a","h"]
Output: ["h","a","n","n","a","H"]
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What is the optimal approach for this problem?