while(1):
    try:
        num=list(map(int,input().split()))
        if(len(num)==1 and num[0]==0):
            break
        m=num[0]
        a=num[1]
        b=num[2]
        c=a+b
        if(c==0):
            print(0)
            continue
        out=[]
        while(c):
            out.append(c%m)
            c=c//m
        ss=out[::-1]
        for i in ss:
            print(i,end='')
        print()
    except:
        break