Given an array of positive integers. The task is to print the minimum product of any two numbers of the given array.
The first line of input contains an integer T denoting the number of test cases. Then T test cases follow. Each test case consists of two lines. First line of each test case contains a integer N and the second line contains N space separated array elements.
For each test case, print the minimum product of two numbers in new line.
2 7 3 4
5 3 6 4
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