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#include<iostream>
using namespace std;

int main()
{
	long long int m = 0;
	long long int c = 0;
	long long int x = 0; 
	long long int k,a,b;
	cin >> k >> a >> b;
	for(int i = a; i<=b; i++)
	{
		if(i%k == 0)
		{
			for(int j = 1; j<i; j *= 10)
			{
			m = (i/j)%10;
			c += (m*m);
			}
			if(c == i/k)
			{
			x += 1;
			}
			c = 0;
		}
	}
cout << x << endl;;
return 0;
}