func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     int t;     cin >> t;     while (t--) {       int n;       cin >> n;       int a[n];       for (int i = 0; i < n; i++) {         cin >> a[i];       }       sort(a, a + n);       int count = 0;       int groups = 0;       for (int i = 0; i < n; i++) {         if (++count == a[i]) {           count = 0;           groups++;         }       }       cout << groups << endl;     }   }   