A=[6,2,5,5,4,5,6,3,7,6]
for i in range(10,10**5+1):
    x=i
    tmp=0
    while 1:
        one=x%10
        tmp+=A[one]
        rest=x//10
        x=rest
        if x==0:break
    A.append(tmp)
#print(A)
N=int(input())
idx=0
for x in range(10**5+1):
    if N>=A[x]:idx=x
print(idx)