func_code_string: #include <bits/stdc++.h>   int len;   int big;   int Dgt[30];   int N;   int ans;   void tochar(int);   int main() {     while (scanf( %d , &N) != EOF) {       memset(Dgt, 0, sizeof(Dgt));       ans = 0;       while (N) {         big = -1;         tochar(N);         for (int i = 0; i < len; i++) {           if (Dgt[i] > big) big = Dgt[i];         }         N -= big;         ans++;       }       printf( %d n , ans);     }   }   void tochar(int n) {     len = 0;     while (n) {       Dgt[len] = n % 10;       n /= 10;       len++;     }   }   