Three elements

Given an array a[1..n] with n positive integers. You can select any 3 different indices i, j, k and sum up the values a[i], a[j], a[k]. You need to output the maximum sum you can make by selecting some i, j, k. Input The first line contains an integer T indicating the number of test cases. For each test case, the first line contains n indicating the size of array a. Second line of each test ca