import sys

int1 = lambda x: int(x) - 1

# input = lambda: sys.stdin.buffer.readline()
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
i1 = lambda: int1(input())
mi = lambda: map(int, input().split())
mi1 = lambda: map(int1, input().split())
li = lambda: list(mi())
li1 = lambda: list(mi1())
lli = lambda n: [li() for _ in range(n)]

INF = float("inf")
mod = int(1e9 + 7)
# mod = 998244353

n = ii()
s = ["?"] * (n + 1)
c = 9
for i in range(1, n + 1, 2):
    s[i] = "1"
for i in range(2, n + 1, 2)[::-1]:
    if i + (i + 2) <= n and ord(s[i + (i + 2)]) - ord("0") <= c:
        c -= 1
    if c == 0:
        break
    s[i] = chr(ord("0") + c)
for i in range(1, n + 1):
    if i + 1 <= n:
        assert s[i] != s[i + 1]
    assert s[i] in "123456789"
    for j in range(i + 1, n + 1):
        if s[i] == s[j] and i + j <= n:
            assert ord(s[i]) < ord(s[i + j])
print("".join(s[1:]))