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#include <cstdio>

long long f(long long x)
{
	int s=0, d;
	do 
	{
	d=x%10;
	s=s+d*d;
	x=x/10;
	} 
	while(x>0);
	return (long long)s;
}
int main ()
{
	long long k, a, b, j, i,l=0, z, r;

	scanf("%lld %lld %lld", &k, &a, &b );
	r=a%k;
	if(r>0)
	{
		z=k-r;
		a=a+k-r;
	}
	if(b>k*(18*81+1))
		b=k*(18*81);
	for(i=a;i<=b;i=i+k)
	{
		if(f(i)*k==i)
		{
			l++;
		}
	}
	printf("%lld", l);
	return 0;
}