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//
//  main.cpp
//  ROW
//
//  Created by Sebastian Mróz on 23/09/2015.
//  Copyright (c) 2015 Sebastian Mróz. All rights reserved.
//

#include <iostream>
#include <cmath>
#include <string>

using namespace std;




int main(int argc, const char * argv[]) {
    // insert code here...
    unsigned long long a;
    unsigned long long b;
    unsigned long long k;
    long long suma = 0 ;
    int counter = 0 ;
    long long int number_length;
    string number;
    
    cin >> k >> a >> b;
    
    while( a%k != 0)
        a++;
    
    for( unsigned long long  i = a; i <= b; i+=k ){
        
        number = to_string(i);
        number_length = number.length();
        suma = 0;
        
        for( int j = 0; j < number_length; j++){
            
            long long int x = number[ number_length-j-1 ];
            x-=48;
            suma += (pow(10,j) - k*x)*x;
        }
        if( suma == 0 ){
            counter++;
        }
    }
    
    cout << counter << endl;
    
    return 0;
}