func_code_string: #include <bits/stdc++.h>   using namespace std;   string s;   int cnt;   int getdeal(long long c) {     int ret = 0;     while (c) {       ret += c % 10;       c /= 10;     }     return ret;   }   int main() {     ios::sync_with_stdio(false);     long long n;     cin >> n;     long long temp = 0;     while (temp * 10 + 9 <= n) {       temp = temp * 10 + 9;     }     cout << getdeal(temp) + getdeal(n - temp);   }   