#include<bits/stdc++.h>
using namespace std;
int main() {
	int n,sum = 0,num = 0,cnt,z = 1;
	cin >>  n;
	for (int i = 1;i <= n; i++) {
		z = 1;
		sum = 0;
		cnt=i;
		while(cnt!=0){
			sum += cnt % 10;
			z *= cnt % 10;
			cnt = cnt / 10;
		}
		
		
		if (sum >= 20&& z >= 162) {
		    num ++;
	    }
	}
	cout << num;
	return 0;
}