func_code_string: #include <bits/stdc++.h>   int luckyDigits(long long int *a) {     int count1 = 0, dig;     while (*a != 0) {       dig = *a % 10;       if (dig == 4 || dig == 7) {         count1++;       }       *a = *a / 10;     }     return count1;   }   int main() {     long long int i, j, k, n, a, count = 0;     scanf( %lld%lld , &n, &k);     for (i = 0; i < n; i++) {       a = 0;       scanf( %lld , &a);       if (luckyDigits(&a) <= k) {         count++;       }     }     printf( %lld , count);   }   