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 PYTHON):

Solution:
import sys,math
from fractions import gcd
from bisect import bisect_left, bisect
from collections import defaultdict
from io import BytesIO
sys.stdin = BytesIO(sys.stdin.read())
input = lambda: sys.stdin.readline().rstrip('\r\n')
n = int(input())
#arr = [int(_) for _ in input().split()]
rsp = list()
for _ in range(n):
    kk = int(input())
    arr = [int(_) for _ in input().split()]
    res = 0
    m = 0
    d = defaultdict(int)
    for el in arr:
        d[el] += 1
        m = max(m,d[el])
    d2 = defaultdict(int)
    for k in d:
        d2[d[k]] += 1
    cur = m+1
    #print(d2)
    for k in sorted(d2.keys(),reverse = True):
        #print(k,res,cur)
        m = min(cur,k)
        if m <= d2[k]:
            res += (m + 1) * m / 2 
            break
        else:
            res += (m + m - d2[k] + 1) * d2[k] / 2
        cur = m - d2[k]
    rsp.append(str(res))
print('\n'.join(rsp))