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#include <iostream>

using namespace std;
/* run this program using the console pauser or add your own getch, system("pause") or input loop */

int main(int argc, char** argv) 
{
	long long k, a,b;
	long long sw=0;
	
	cin >> k >> a >> b;
		for (long long i=a; i <=b; i++)
		{
			int d=10;
			long long fn=0;
			long long l=i;
			while(l!=0)
			{
				fn+=(l%d)*(l%d);
				l=l/d;
			}
			if(k*fn==i)
			{
				sw=i;
				break;
			}
		}
		
	//	cout << sw;
		long long wynik=0;
		
	for (long long i=sw; i <=b; i+=k)
	{
			int d=10;
			long long fn=0;
			long long l=i;
			while(l!=0)
			{
				fn+=(l%d)*(l%d);
				l=l/d;
			}
			if(k*fn==i)
			{
				wynik++;
				
			}
	}
	cout << wynik;
	return 0;
}