func_code_string: #include <bits/stdc++.h>   #pragma comment(linker,  /STACK:102400000,102400000 )   using namespace std;   int main() {     int n, m;     cin >> n >> m;     int ret = 0;     while (n--) {       char str[1009];       int cnt = 0;       scanf( %s , str);       int flag = 1;       for (int i = 0; str[i]; i++) {         if (str[i] ==  4  || str[i] ==  7 ) {           cnt++;           if (cnt > m) {             flag = 0;             break;           }         }       }       if (flag == 1) {         ret++;       }     }     cout << ret << endl;     return 0;   }   