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#include <iostream>

using namespace std;

int main()
{
    ios_base::sync_with_stdio(0);

    unsigned long long k,a,b;
    unsigned long long n,suman;
    unsigned long long ilosc=0;
    unsigned long long temp;
    unsigned long long cyfra;

    cin>>k>>a>>b;

    for(unsigned long long x=a;x<=b;x++)
    {
        suman=0;
        n=x;
        temp=x;

      //  cout<<"LICZBA: "<<x<<endl;

        while(temp>0)
        {
            cyfra=temp%10;
            temp/=10;
            suman+=cyfra*cyfra;
          //  cout<<"CYFRA: "<<cyfra<<endl;
          //  cout<<"SUMAN "<<suman<<endl;




        }
         if(k*suman==n)
            {
                ilosc++;
            }
    }

cout<<ilosc<<endl;
    return 0;
}