Given an array with repeated elements, the task is to find the maximum distance between two occurrences of an element.

**Input:**

The first line of input will contain no of test cases T . Then T test cases follow . Each test case contains 2 lines. The first line of each test case contains an integer N denoting the number of elements in the array, the next line contains N space separated integer's.

**Output:**

For each test case in new line print the Maximum distance between two occurrences of an element

**Constraints:**

1<=T<=100

1<=N<=1000

**Example:**

**Input**

2

6

1 1 2 2 2 1

12

3 2 1 2 1 4 5 8 6 7 4 2

**Output**

5

10

**Explanation**

Test case 1:

arr[] = {1, 1, 2, 2, 2, 1}

Max Distance: 5

Distance for 1 is: 5-0 = 5

Distance for 2 is : 4-2 = 2

Max Distance 5

Test case 2:

arr[] = {3, 2, 1, 2, 1, 4, 5, 8, 6, 7, 4, 2}

Max Distance 10

maximum distance for 2 is 11-1 = 10

maximum distance for 1 is 4-2 = 2

maximum distance for 4 is 10-5 = 5

**Note:**The **Input/Ouput** format and **Example** given are used for system's internal purpose, and should be used by a user for **Expected Output** only. As it is a function problem, hence a user should not read any input from stdin/console. The task is to complete the function specified, and not to write the full code.

#### ** For More Input/Output Examples Use 'Expected Output' option **