func_code_string: #include <bits/stdc++.h>   using namespace std;   signed main() {     long long n;     cin >> n;     long long a[n];     long long sum = 0;     for (long long i = 0; i < n; i++) {       cin >> a[i];       sum += a[i];     }     long long req = ceil(4.5 * n) - sum;     vector<long long> b(n);     for (long long i = 0; i < n; i++) {       b[i] = 5 - a[i];     }     bool check = 0;     sort(b.begin(), b.end(), greater<long long>());     long long ans = 0;     for (long long i = 0; i < n; i++) {       if (req <= 0) {         cout << ans;         check = 1;         break;       }       req -= b[i];       ans++;     }     if (!check) cout << n;     return 0;   }   