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#include <bits/stdc++.h>
#define ll long long
#define ld long double
#define PI 3.14
using namespace std;

void testCase()
{

    int n;
    cin>>n;
    int arr[n];
    int freq[101]={};

    for(int i=0;i<n;i++){
        cin>>arr[i];
        freq[arr[i]]++;
    }

    int counter=0;

    for(int i=0;i<101;i++){
        if(freq[i]>i){
            counter+=(freq[i]-i);
        }
        else if(freq[i]<i){
            counter+=freq[i];
        }
    }
    cout<<counter<<endl;





}



int main()
{
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
 
    int t=1;
    cin>>t;
 
    while(t--){
        testCase();
    }

    
    return 0;
}