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#include<iostream>
#include<cstdio>

using namespace std;

long long pocz, kon, k, ans;

int skc( long long x )
{
	long long ans = 0;
	while( x )
	{
		ans += (x%10)*(x%10);
		x /= 10;
	}
	return ans;
}
int main()
{
	cin>>k>>pocz>>kon;
	for( int a = 1; a <= 1458; a++ )
	{
		if( k*a >= pocz && k*a <= kon )
		{
			if( skc( k * a ) == a )ans++;
		}
	}
	cout<<ans;
	
	
	return 0;
}