#include<bits/stdc++.h>
using namespace std;
int main()
{
int n,r=1,s=0,a,d;
cin>>n;
while(r<=n){
	a=r/10%10;
	d=r/100;
	if(r%10==7||a==7||d==7||r%7==0){
		r++;
		continue;
	}
	s=s+r;
	r++;
}
cout<<s;
return 0;
}

/**************************************************************
	Problem: 1393
	User: zzz
	Language: C++
	Result: Accepted
	Time:21 ms
	Memory:2072 kb
****************************************************************/