Problem: This problem is actually a subproblem of problem G from the same contest.

There are n candies in a candy box. The type of the i-th candy is a_i (1 ≤ a_i ≤ n).

You have to prepare a gift using some of these candies with the following restriction: the numbers of candies of each type presented in a gift should be all distinct (i. e. for example, a gift having two candies of type 1 and two candies of type 2 is bad). 

It is possible that multiple types of candies are completely absent from the gift. It is also possible that not all candies of some types will be taken to a gift.

Your task is to find out the maximum possible size of the single gift you can prepare using the candies you have.

You have to answer q independent queries.

If you are Python programmer, consider using PyPy instead of Python when you submit your code.

Input

The first line of the input contains one integer q (1 ≤ q ≤ 2 ⋅ 10^5) — the number of queries. Each query is represented by two lines.

The first line of each query contains one integer n (1 ≤ n ≤ 2 ⋅ 10^5) — the number of candies.

The second line of each query contains n integers a_1, a_2, ..., a_n (1 ≤ a_i ≤ n), where a_i is the type of the i-th candy in the box.

It is guaranteed that the sum of n over all queries does not exceed 2 ⋅ 10^5.

Output

For each query print one integer — the maximum possible size of the single gift you can compose using candies you got in this query with the restriction described in the problem statement.

Example

Input


3
8
1 4 8 4 5 6 3 8
16
2 1 3 3 4 3 4 4 1 3 2 2 2 4 1 1
9
2 2 4 4 4 7 7 7 7


Output


3
10
9

Note

In the first query, you can prepare a gift with two candies of type 8 and one candy of type 5, totalling to 3 candies.

Note that this is not the only possible solution — taking two candies of type 4 and one candy of type 6 is also valid.

Solution (in JAVA):

Solution:
import java.io.*;
import java.util.*;
public class D
{
    public static void main(String []args)throws IOException
    {
        BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
        int t = Integer.parseInt(br.readLine());
        while(t-->0)
        {
            String s = br.readLine();
            int n = Integer.parseInt(s);
            s = br.readLine();
            String[] st = s.split(" ");
            int[] arr = new int[n];
            int[] count = new int[n];
            for(int i=0;i<n;i++)
            {
                arr[i] = Integer.parseInt(st[i]);
                count[i] = 0;
            }
            for(int i = 0;i<n;i++)
            {
                count[arr[i]-1] ++;
            }
            Arrays.sort(count);
            int max = count[n-1];
            int sum = max;
            for(int i=n-2;i>=0;i--)
            {
                if(count[i] >= max && max >0)
                {
                    sum = sum + max -1;
                    max--;
                }
                else
                if(count[i] < max)
                {
                    sum = sum + count[i];
                    max = count[i];
                }
            }
            System.out.println(sum);
        }
    }
}