// DEM SO DEP
#include<bits/stdc++.h>
#define ll long long
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#pragma GCC optimize("O3","unroll-loops")
#pragma GCC optimize("Ofast")
using namespace std;
bool check(ll n)
{
    while(n>0)
    {
        if(n%10!=6&&n%10!=8)
            return false;
        n/=10;
    }
    return true;
}
int main() {
    ios
    ll n;
    cin>>n;
    ll d=0;
    for(int i=1;i<=n;i++)
    {
        if(check(i)) d++;
    }
    cout<<d;
    return 0;
}

//Phân tích số
#include<bits/stdc++.h>
#define ll long long
#define ios ios_base::sync_with_stdio(0);cin.tie(0);cout.tie(0);
#pragma GCC optimize("O3","unroll-loops")
#pragma GCC optimize("Ofast")
using namespace std;
int main() {
    ios
    ll n;
    cin>>n;
    ll x=1;
    ll y=n;
    ll Min=x+y;
    for(int i=1;i<=sqrt(n);i++)
    {
        if(n%i==0)
        {
            ll j=n/i;
            if(i+j<Min)
            {
                x=i;
                y=j;
                Min=i+j;
            }
        }
    }
    cout<<x<<" "<<y;
    return 0;
}