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Min XOR value

Problem Setter: mihai.gheorghe Problem Tester: archit.rai

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:

    First and only argument of input contains an integer array A

Output Format:

    return a single integer denoting minimum xor value


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

For Examples :

Example Input 1:
    A = [0, 2, 5, 7]
Example Output 1:
    0 xor 2 = 2
Example Input 2:
    A = [0, 4, 7, 9]
Example Output 2:
NOTE: You only need to implement the given function. Do not read input, instead use the arguments to the function. Do not print the output, instead return values as specified. Still have a doubt? Checkout Sample Codes for more details.
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