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.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;
import java.util.PriorityQueue;
import java.util.Scanner;

public class CandyBoxH {
    static class Candy implements Comparable<Candy> {
        int count;
        int fcount;

        public Candy(int count, int fcount) {
            this.count = count;
            this.fcount = fcount;
        }

        @Override
        public int compareTo(Candy o) {
            int ret = Integer.compare(o.count, count);
            if (ret == 0) {
                return Integer.compare(o.fcount, fcount);
            }
            return ret;
        }
    }

    public static void main(String[] args) {
        Scanner in = new Scanner(new BufferedReader(new InputStreamReader(System.in)));
        int q = in.nextInt();
        for (int i = 0; i < q; i++) {
            int n = in.nextInt();
            Candy[] candies = new Candy[n];
            int j;
            for (j = 0; j < n; j++) {
                candies[j] = new Candy(0, 0);
            }
            for (j = 0; j < n; j++) {
                int type = in.nextInt();
                int f = in.nextInt();
                candies[type - 1].count++;
                candies[type - 1].fcount += f;
            }
            PriorityQueue<Candy> pq = new PriorityQueue(Arrays.asList(candies));
            Candy c = pq.poll();
            int gift = c.count;
            int f = c.fcount;
            int typeSize = c.count - 1;
            while (!pq.isEmpty()) {
                if (typeSize == 0) {
                    break;
                }
                // Handle reinserts
                while (!pq.isEmpty() && pq.peek().count > typeSize) {
                    Candy reinsert = pq.poll();
                    reinsert.count = typeSize;
                    pq.add(reinsert);
                }
                c = pq.poll();
                if (c.count == 0) {
                    break;
                }
                if (c.count >= typeSize) {
                    gift += typeSize;
                    if (c.fcount >= typeSize) {
                        f += typeSize;
                    } else {
                        f += c.fcount;
                    }
                    typeSize--;
                } else {
                    gift += c.count;
                    f += c.fcount;
                    typeSize = c.count - 1;
                }

            }
            System.out.println(gift + " " + f);
        }
    }
}