Why my code is giving wrong answers?

#1

I was solving the gray similar code problem on CodeChef.

Why my code is giving the wrong answers?

codechef Problem link: https://www.codechef.com/problems/GRAYSC

My solution: https://ide.codingblocks.com/s/240434

#2

@siddharth_1_3277
Range of input is 2^64
For that use unsigned long long instead of long long

#3

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