n=int(input())
ans=[0]*(n+1)
for i in range(1,n+1,2):
    ans[i]=1
c=n
if n&1:
    c-=1
p=9;ans[c]=p;c-=2
while p>1 and c>0:
    while c>0 and ans[c+2]!=p or c+c+2>n or ans[c*2+1]>p:
        ans[c]=p;c-=2
    p-=1
print("".join(map(str,ans[1:])))