Prasad, I enjoyed thinking through the pattern to solve this problem and the related problem. One suggestion for both is to add more test cases so that solvers cannot simply write their codes to return the answer to the single test case.
Add two numbers
Given an unsigned integer x, find the largest y by rearranging the bits in x
Back to basics 23 - Triangular matrix
Sum the Digits of a Number
Find the 9's Complement
Four digit number ABCD reversal
Number of o rderd pairs of integers (I,J) that can be formed.
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