it doesnot effect the original string so we don"t require the backtracking step ??
is it possible to do this ques in this manner ?
Is it possible to make another empty array of string let named it output arr and add the characters into it and if we got a null operator then we simply print the out array
hello @anshulgurawalia
no it will not be helpful.
becuase at any stage of recursion ,all its previous changes matter so u cant simply create new output array using input array at every step.