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 $a_i$ ($1 \le a_i \le n$).

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 $q$ ($1 \le q \le 2 \cdot 10^5$) — the number of queries. Each query is represented by two lines.

The first line of each query contains one integer $n$ ($1 \le n \le 2 \cdot 10^5$) — the number of candies.

The second line of each query contains $n$ integers $a_1, a_2, \dots, a_n$ ($1 \le a_i \le n$), 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 $2 \cdot 10^5$.


-----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.

```python

USER_FILENAME = "<user_code>"
import sys, json, builtins
import math, heapq, bisect, itertools, functools, collections, statistics, fractions, decimal, operator, array, random, re, string, os, pathlib
try:
    import resource as _res
except Exception:
    _res = None
from collections import Counter, defaultdict, deque, OrderedDict
from functools import lru_cache, reduce
from itertools import accumulate, permutations, combinations, product
from math import gcd, ceil, floor, sqrt
from decimal import Decimal
try:
    from typing import *
except Exception:
    pass
try:
    sys.setrecursionlimit(1_000_000)
except Exception:
    pass
try:
    import site as _site
    try:
        _sys_sites = _site.getsitepackages() if hasattr(_site, "getsitepackages") else []
        for _p in _sys_sites:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
    try:
        _usp = _site.getusersitepackages()
        if isinstance(_usp, str):
            _usp = [_usp]
        for _p in _usp:
            if _p and _p not in sys.path:
                sys.path.append(_p)
    except Exception:
        pass
except Exception:
    pass

ns = {"__name__": "__main__"}
for _k, _v in list(globals().items()):
    if not _k.startswith("_"):
        ns[_k] = _v
_CODE = '#   In this template you are not required to write code in main\n\nimport sys\ninf = float("inf")\n\n#from collections import deque, Counter, OrderedDict,defaultdict\n#from heapq import nsmallest, nlargest, heapify,heappop ,heappush, heapreplace\n#from math import ceil,floor,log,sqrt,factorial,pow,pi,gcd\n#from bisect import bisect_left,bisect_right\n\nabc=\'abcdefghijklmnopqrstuvwxyz\'\nabd={\'a\': 0, \'b\': 1, \'c\': 2, \'d\': 3, \'e\': 4, \'f\': 5, \'g\': 6, \'h\': 7, \'i\': 8, \'j\': 9, \'k\': 10, \'l\': 11, \'m\': 12, \'n\': 13, \'o\': 14, \'p\': 15, \'q\': 16, \'r\': 17, \'s\': 18, \'t\': 19, \'u\': 20, \'v\': 21, \'w\': 22, \'x\': 23, \'y\': 24, \'z\': 25}\nmod,MOD=1000000007,998244353\nvow=[\'a\',\'e\',\'i\',\'o\',\'u\']\ndx,dy=[-1,1,0,0],[0,0,1,-1]\n\ndef get_array(): return list(map(int, sys.stdin.readline().strip().split()))\ndef get_ints(): return map(int, sys.stdin.readline().strip().split())\ndef input(): return sys.stdin.readline().strip()\n\nQ=int(input())\nwhile Q>0:\n    mydict1 = dict()\n    n=int(input())\n    a=get_array()\n    for j in a:\n        mydict1[j]=mydict1.get(j,0)+1\n    ct = 0\n    myset1=set()\n    for i in mydict1:\n        if mydict1[i] not in myset1:\n            ct+=mydict1[i]\n            myset1.add(mydict1[i])\n        else:\n            z=mydict1[i]\n            for i in range(z,0,-1):\n                if i not in myset1:\n                    ct+=i\n                    myset1.add(i)\n                    break\n    print(ct)\n    Q-=1'
_co = compile(_CODE, USER_FILENAME, "exec")
exec(_co, ns, ns)

```

Measured memory_bytes: 15565