<gh_stars>1-10
import itertools
N=int(input())
ans=0
S=[]
for i in range(10):
    S+=list(itertools.product("357",repeat=i))
for s in S:
    if len(set(s))>2 and int("".join(s))<=N:
        ans+=1
print(ans)
import itertools
N=int(input())
ans=0
S=[]
for i in range(10):
    S+=list(itertools.product("357",repeat=i))
for s in S:
    if len(set(s))>2 and int("".join(s))<=N:
        ans+=1
print(ans)