#include <bits/stdc++.h>
using namespace std;
 
long long int ret(vector<long long int> a){
	long long int i,ct,pct,pval;
	sort(a.begin(),a.end());
	ct=0;
	pct=0;
	pval=0;
	for(i=0;i<a.size();i++){
		if(i==0||(a[i]!=a[i-1])||pct+1>pval){
			ct+=a[i];
			ct++;
			pval=a[i]+1;
			pct=0;
		}
		pct++;
	}
	return ct;
}
 
int main() {
	long long int t,i,n,j,temp;
	cin>>t;
	for(i=0;i<t;i++){
		cin>>n;
		vector<long long int> a;
		for(j=0;j<n;j++){
			cin>>temp;
			a.push_back(temp);
		}
		cout<<ret(a)<<"\n";
	}
 
	return 0;
}

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NAo0CjIgMiAyIDIKNQoyIDEgMSAyIDMgCjIKNiA3CjYKMTAgMTAgNSAxMCAxMCA1Cg==

4
4
2 2 2 2
5
2 1 1 2 3 
2
6 7
6
10 10 5 10 10 5