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#include <iostream>
#include <sstream>
using namespace std;
long long power [10] = { 0, 1, 4, 9, 16, 25,36,49,64,81 };
int match=0;
long long funkcjaN(long long digit);
int main()
{
  long long k,a,b;
   cin>>k;
   cin>>a;
   cin>>b;
   
   for (long long  i=a;i<=b;i++)
    {
        long long wynik = k*funkcjaN(i);
        //cout << wynik << endl;
        if(wynik==i)
        {
        	match+=1;	
        }
    }
   
   cout << match << endl;
   return 0;
}
long long funkcjaN(long long digit)
{
	long long sum = 0;
	std::ostringstream ss;
	ss << digit;
	std::string stringDigit = ss.str();
    for(int i=0;i< stringDigit.length();i++)
    {
    	int index = stringDigit[i]-'0';
        sum += power[index];
    }
    return sum;
}