#include <stdio.h>  
int m;  
void Ck(int n)  
{  
    if(n>=m)  
        Ck(n/m);  
    printf("%d",n%m);  
}  
int main()  
{  
    int A,B;  
    unsigned int C;  
    while(scanf("%d",&m),m)  
    {  
        scanf("%d%d",&A,&B);  
        C = A+B;  
        Ck(C);   
        printf("\n");  
    }  
    return 0;  
}