int main()
{
    int sum=0;
    int i=1;
    int n;
    scanf("%d",&n);
    while(i<=n)
    {
		int a=i/10;
		int b=i/100;
	if((i%7==0)||(i==10*a+7)||(a==7)||((i-100*b)/10==7))	
         {
            i++;
            continue;
          }
          sum=sum+i*i;
          i++;
    }
    printf("%d",sum);
    return 0;
}
