#include <bits/stdc++.h>
using namespace std;
  
int main(){
    int n,i,r = 0,g,s,b,q,w;
    cin>>n;
    for(i=10000;i<=n;i++){
        w = i / 10000;
        q = i /1000 % 10;
        b = i / 100 % 10;
        s = i / 10 % 10;
        g = i % 10;
        if(w%2==0&&q%2==0&&b%2==0&&s%2==0&&g%2==0){
            r = r + 1;
        }
    }
      
    cout<<r;
}
/**************************************************************
	Problem: 1745
	User: wangyiyang
	Language: C++
	Result: Accepted
	Time:8 ms
	Memory:2072 kb
****************************************************************/