func_code_string: #include <bits/stdc++.h>   int a[201][3];   using namespace std;   int main() {     ios_base::sync_with_stdio(false);     cin.tie(NULL);     int n, k;     cin >> n >> k;     vector<string> a;     for (int i = 0; i < n; i++) {       string r;       cin >> r;       a.push_back(r);     }     int count = 0, ans = 0;     for (int i = 0; i < n; i++) {       for (int j = 0; j < a[i].size(); j++) {         if (a[i][j] ==  4  || a[i][j] ==  7 ) count++;         if (count > k) break;       }       if (count <= k) ans++;       count = 0;     }     cout << ans;     return 0;   }   