#include <bits/stdc++.h> 
using namespace std;
int main()
{
    int a,sum=0;
    cin >> a;
    for (int i=1;i<=a;i++) 
    {
        int b=i/1000;
        int c=i/100%10;
        int d=i/10%10;
        int e=i%10;
        if (i%7 == 0 ||b==7 || c==7|| d==7||e==7 )
        {
            sum+=i;
        }
    }
    cout << sum;
    return 0;
}