Pls tell me the implementation of the question

#1

pls decribe ;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;;

#2

hi @suryansh771 you have to check each digit, if it is >= 5 you have to replace it by 9-digit
The number cannot have any leading zeroes, so if the first digit is 9 you should not flip it
You can store the number as a string instead of int for easier processing

#3

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