#include <bits/stdc++.h>
using namespace std;
bool a(int n){
	int i,s=0;
	while(n!=0){
		s+=n%10;
		n/=10;
	}
	if(s==13)
		return 1;
	else
		return 0;
} 
int main(){
	int i,n,s=0;
	bool l=0;
	cin>>n;
	for(i=1;i<n;i++){
		if(a(i))
			s++;			
	}
	cout<<s;
	return 0;
	}

/**************************************************************
	Problem: 1511
	User: fzy001
	Language: C++
	Result: Accepted
	Time:111 ms
	Memory:2072 kb
****************************************************************/