Recursion duplicate character

#1

how to do the question

#2

@anmolsr755
Obtain the result for substring starting at index 1. Store this in another string , say ‘ros’ .
Check whether the first character of current string and first character of ros are same.
If so return , add a " * " to the new result and concatenate as s[0] + " * " + ros.
Else simply return s[0] + ros.

try to make code based on above hint if faces any problem tell me.

#3

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