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#include<bits/stdc++.h>
using namespace std;
main()
	{
	long long k,a,b,licz=0,suma=0,val;
	cin>>k>>a>>b;
	while(a<=b)
		{
		if(a%k==0)
			{
			val=a;
			while(val!=0)
				{
				suma=suma+pow(val%10,2);
				val=val/10;
				}
			if(suma==a/k)
				licz++;
			else
				{
				suma=0;
				a+=k;
				}
			}
		else
			a++;
		}
		cout<<licz;
	}