B'We define the operatorname{MAD} (Maximum Appearing Duplicate) in an array as the largest number that appears at least twice in the array. Specifically, if there is no number that appears at least twice, the operatorname{MAD} value is 0 . For example, operatorname{MAD}([1, 2, 1]) = 1 , operatorname{MAD}([2, 2, 3, 3]) = 3 , operatorname{MAD}([1, 2, 3, 4]) = 0 . You are given an array a of size n . Initially, a variable sum is set to 0 . The following process will be executed in a sequential loop until all numbers in a become 0 : Find the value of sum after the process. The first line contains an integer t ( 1 <= q t <= q 2 cdot 10^4 ) -- the number of test cases. For each test case: It is guaranteed that the sum of n over all test cases will not exceed 2 cdot 10^5 . For each test case, output the value of sum in a new line. In the first test case, a=[1] initially. In the first loop: After the first loop, a=[0] and the process ends. The value of sum after the process is 1 . In the second test case, a=[2,2,3] initially. After the first loop, a=[0,2,2] and sum=7 . After the second loop, a=[0,0,2] and sum=11 . After the third loop, a=[0,0,0] and sum=13 . Then the process ends. The value of sum after the process is 13 . '...