#include<stdio.h>
int num[1000000];
int switcha(int a,int b)
{
	int i,j;
	int len;
	len=0;
	while(b)
	{
		num[len]=b%a;
		len++;
		b/=a;
	}
	for(i=len-1;i>=0;i--)
	    printf("%d",num[i]);
	printf("\n");
}
int main()
{
	int m,a,b;
	int sum;
	while(scanf("%d",&m),m)
	{
		scanf("%d%d",&a,&b);
		sum=a+b;
		if(sum==0)
		    printf("%d\n",0);//单独考虑0，因为取余的时候遇到0会直接跳过 
		else
		    switcha(m,sum);
	}
	return 0;
}