# p^2 x = ab.ababab
# x = 0.ababab
# (p^2-1)x = ab
# x=ab/(p^2-1)
# ab/(p^2-1) > 1/n
# ab n + 1 > p^2
# (ap + b) n - p^2 >= 0
# -p^2 + an p + bn >= 0
from math import isqrt
n = int(input())
ans = 0
for a in range(10):
    for b in range(10):
        if a == b:
            continue
        an = a * n
        bn = b * n
        def check(p):
            return p * (an - p) + bn >= 0
        l = 0
        r = 1
        while check(r):
            l = r
            r *= 2
        while r - l > 1:
            c = (l + r) // 2
            if check(c):
                l = c
            else:
                r = c
        pmx = min(l, 10 ** 9)
        pmn = max(2, a + 1, b + 1)
        ans += max(0, pmx - pmn + 1)
print(ans)