#include <bits/stdc++.h>
using namespace std;
int main(){
	int n,t=0,a=0,s=0;
	cin>>n;
	for(int i=1;i<=n;i++)
	{t=i;a=0;
		while(t)
		{
			a+=t%10;
			t/=10;
		}
	if(a%5!=0&&a%2!=0)s+=1;
	}
	cout<<s;
	return 0;
	}

/**************************************************************
	Problem: 1395
	User: ljl2
	Language: C++
	Result: Accepted
	Time:23 ms
	Memory:2072 kb
****************************************************************/