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 PYTHON3):

Solution:

from sys import stdin, stdout
#from math import pow
#import numpy as np
from collections import Counter

for _ in range(int(stdin.readline())):
    n = int(stdin.readline())
    l = map(int, stdin.readline().split())
    a = dict(Counter(l))
    v = list(a.values())
    v.sort()
    v = v[::-1]
    #print(v)
    i = 0
    if len(v)==1:
        stdout.write(str(v[0])+"\n")
        continue
    while i<len(v)-1:
        if v[i] < v[i+1] and v[i]!=0:
            v[i+1] = v[i]-1
        if v[i] < v[i+1] and v[i]==0:
            v[i+1] = 0
        if v[i]==v[i+1] and v[i+1]!=0:
            v[i+1] -= 1
        i+=1

    stdout.write(str(sum(v))+ "\n")

    #print(sum)