N = int(input())
ans = 0
p = 2

while N * (p * 9 + 9) > p * p - 1:
    flag = 1
    for a in reversed(range(min(p, 10))):
        b = max(- ((- p * p + 1 + N * p * a) // N), 0)
        if 0 <= b < min(p, 10):
            tmp = (min(p, 10) - b - 1)
            if a < b:
                tmp += 1
            ans += tmp
            #print(p, a, b, tmp)
        else:
            break
    p += 1
print(ans)