func_code_string: #include <bits/stdc++.h>   using namespace std;   int main() {     long long k;     cin >> k;     getchar();     char s[1000001];     cin >> s;     int a[strlen(s)];     long long sum = 0;     for (int i = 0; i < strlen(s); i++) {       sum += s[i] - 48;       a[i] = s[i] - 48;     }     k = k - sum;     sort(a, a + strlen(s));     int c = 0;     for (int i = 0; i < strlen(s); i++) {       if (k > 0) {         k -= (9 - a[i]);         c++;       } else         break;     }     cout << c << endl;   }   