func_code_string: #include <bits/stdc++.h>   using namespace std;   bool check(long n, long k) {     long dem = 0;     while (n > 0) {       long x = n % 10;       n /= 10;       (x == 4 || x == 7) ? dem++ : dem = dem;     }     if (dem <= k) return 1;     return 0;   }   int main() {     long n, k, dem = 0;     cin >> n >> k;     long a[n];     for (long i = 0; i < n; i++) {       cin >> a[i];       if (check(a[i], k) == 1) dem++;     }     cout << dem;   }   