2 testcases failing

plese check out my code

Hello @dbhavanishankar89,

  1. Use string over char array
    Because char array reflects the changes in the body of calling function also while string array does not.
    To understand this better, print arr inside the for loop and see the difference.

  2. There is no need of swapping back.

I have modified your code, refer the comments for better understanding:

Hope, this would help.
Give a like, if you are satisfied.

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