#include <iostream>
using namespace std;

unsigned int cifSoucet(unsigned int i);

int main()
{
	unsigned int x, p, actSoucet;

	cin >> x;
	while(x!=0){
		actSoucet = cifSoucet(x);
		for(p=11; p<42950; p++){
			if(cifSoucet(x*p) == actSoucet) break;
		}
		cout << p << endl; 
		cin >> x;
	}
	return 0;
}

unsigned int cifSoucet(unsigned int i)
{
	unsigned int soucet=0;
	
	while(i!=0){
		soucet += i%10;
		i /= 10;
	}
	
	return soucet;
}