#include <stdio.h>
#include <stdlib.h>

int Sum(long long int a)
{
	int rsl = 0;
	while(a)
	{
		rsl += a % 10;
		a /= 10;
	}
	
	return rsl;
}

int main()
{
	long long int n = 100001;
	while(1)
	{
		scanf("%lld", &n);
		
		if(!(n))
		{
			return 0;
		}
		
		int sum = Sum(n);
		
		for(int p = 11; 1; p++)
		{
			if(Sum(p * n) == sum)
			{
				printf("%d\n", p);
				break;
			}
		}
	}
}