Min XOR value - InterviewBit Solution

Problem: Min XOR value

Problem Description:

Given an integer array A of N integers, find the pair of integers in the array which have minimum XOR value. Report the minimum XOR value.

Input Format:

The first and only argument of input contains an integer array A

Output Format:

return a single integer denoting minimum xor value

Constraints:

2 <= N <= 100 000   
0 <= A[i] <= 1 000 000 000 

For examples,

Example Input 1:
    A = [0, 2, 5, 7]
Example Output 1:
    2
Explanation:
    0 xor 2 = 2
Example Input 2:
    A = [0, 4, 7, 9]
Example Output 2:
    3

Solution Approach:

Solution in C++:

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