func_code_string: #include <bits/stdc++.h>   using namespace std;   int a[109];   int main() {     int n, m;     while (cin >> n >> m) {       for (int i = 0; i < n; i++) cin >> a[i];       int p = 0;       sort(a, a + n);       for (int i = 0; i < n; i++) {         int flag = 0;         while (a[i]) {           if (a[i] % 10 == 4 || a[i] % 10 == 7) flag++;           a[i] /= 10;         }         if (flag <= m) p++;       }       cout << p << endl;     }   }   