#include <iostream>
int main(){
int new_n = 300;
int count = 0;
std::cout << "Start number: " << new_n << '\n';
while(new_n)
{
int buff = 0, n = new_n;
while(n)
{
buff += n % 10;
n /= 10;
}
new_n -= buff;
++count;
std::cout << " New_n: " << new_n << "\tCount: " << count << '\n';
}
std::cout << "Result Count: " << count << '\n';
return 0;
}