//
//  main.cpp
//  potyczki
//
//  Created by PJ on 22.09.2015.
//  Copyright © 2015 redreni. All rights reserved.
//

#include <iostream>

#define lint unsigned long long int

using namespace std;

lint k, a, b;

lint f(lint x){
    lint res=0;
    while (x>=1) {
        res+=(x%10)*(x%10);
        x/=10;
    }
    return res;
}

lint i, ii, ilet, j;

int main(int argc, const char * argv[]) {
    cin>>k>>a>>b;
    lint ile =0;
    lint fi = f(a-1);
    for(i = a; i<=b;){
        ii=i;
        ilet=0;
        while(ii%10==0){
            ilet++;
            ii/=10;
        }
        fi-=(81*ilet);
        j=ii%10;

        if(j!=0){
            fi+=j*2-1;
        }
        
        if(k*fi==i){
            ile++;
        }

        i++;
    }
    cout<<ile<<endl;
    return 0;
}