p = set()
def is_pandigital(n, s=9): return len(n)==s and not '1234567890'[:s].strip(n)
def calc (n):
    for i in range(2,  99):
        j = i+1
        while i*j < 8999:
            if is_pandigital(str(i)+str(j)+str(i*j), n): p.add(i*j)
            j+= 1
    return sum(p)

print (calc(int(input())))