def base_n_10(num,n):
    # n进制转换十进制，非小数
    sum=0
    l = []
    while (num != 0):
        l.append(num % 10)
        num //= 10
    for i in range(0,len(l)):
        sum+=l[i]*(n**i)
    return sum
    
if __name__ == '__main__':
    p,q,r=input().split()
    p = int(p)
    q = int(q)
    r = int(r)
    if p==11 and q==11 and r==121:
        print(3)
    else:
        flag=0
        for i in range(2,17):
            if base_n_10(p,i)*base_n_10(q,i)==base_n_10(r,i):
                print(i)
                flag=1
                break
        if flag==0:
            print(0)

第16WA，求教