Minimum difference pair
Basic Accuracy: 52.76% Submissions: 11256 Points: 1

Given an unsorted array, find the minimum difference between any pair in given array.

Input:

The first line of input contains an integer T denoting the number of test cases.
The first line of each test case is N, the size of array. Second line of the test case is the Array.

Output:

Print the minimum difference between any two pairs.

Constraints:

1 <= T <= 30
1 < N <= 100
1 <= arr[i] <= 100000

Example:
Input:

2
5
2 4 5 7 9
10
87 32 99 75 56 43 21 10 68 49

Output:
1
6

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