#include <bits/stdc++.h> 
using namespace std;
int main()
{
    int n,num = 0,b;
    cin >> n;
    for (int i = 1;i <= n;i++)
    {
        int s = i / 10 % 10;
        int g = i % 10;
        if ((s==7)||(g==7)||(i%7==0))
        {
            b++;
        }
        else
        {
            num += i*i;
        }
    }
    cout << num;
    return 0;
}