#include<bits/stdc++.h>
using namespace std;
int main(){
	int n,i,j,a,h=0;
	cin>>n;
	for(i=1;i<=n;i++){
		j=i;
		while(j>0){
			a=j%10;
			j=j/10;
			if(a!=7||i%7!=0){
				h=h+i;
				break;
			}
		}
	}
	cout<<h;
}
/**************************************************************
	Problem: 1393
	User: linzihang
	Language: C++
	Result: Wrong Answer
****************************************************************/