Reflected Binary Code - Amazon Top Interview Questions


Problem Statement :


Given an integer n, return the nth (0-indexed) gray code number. Gray code is a way of ordering binary numbers such that each consecutive number's values differ by exactly one bit.

The first few gray codes are: [0, 1, 11, 10, 110, 111, ...]

Constraints

0 ≤ n ≤ 1,000,000

Example 1

Input

n = 3

Output

2


Solution :



title-img 




                        Solution in C++ :

int solve(int n) {
    return n ^ (n >> 1);
}
                    




                        Solution in Python : 
                            
class Solution:
    def solve(self, n):
        return n ^ (n // 2)


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