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Max-Min conversion
Basic Accuracy: 56.86% Submissions: 503 Points: 1

Given a number N. You can perform an operation on it multiple times, in which you can change digit 5 to 6 and vice versa.
You have to return the sum of the maximum number and the minimum number which can be obtained by performing such operations.

Example 1:

Input: N = 35
Output: 71
Explanation: The maximum number which can be
formed is 36 and the minimum number which can
be formed is 35 itself.


Example 2:

Input: N = 22
Output: 44
Explanation: The maximum number and minimum
number which can be formed is 22 itself.


You need not take any input or print anything. Your task is to complete the function performOperation() which takes a single Number as input and returns the sum of maximum and minimum number.

Expected Time Complexity: O(Log10N)
Expected Auxiliary Space: O(Log10N)

Constraints:
1 ≤ N ≤ 1018

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