func_code_string: #include <bits/stdc++.h>   using namespace std;   const int N = 1e5 + 4;   void solve() {     int n;     cin >> n;     int arr[n];     for (int i = 0; i < n; i++) cin >> arr[i];     float min = 4.5 * n;     int mn = (int)min;     if (min - mn > 0) mn++;     int sum = 0;     for (int i = 0; i < n; i++) sum += arr[i];     int req = mn - sum;     if (req <= 0) {       cout << 0 << endl;       return;     }     sort(arr, arr + n);     int ans = 0, i = 0;     while (req > 0) {       req -= 5 - arr[i];       i++;       ans++;     }     cout << ans << endl;   }   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int t = 1;     while (t--) {       solve();     }     return 0;   }   