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import java.io.BufferedReader;                                                  
import java.io.IOException;                                                     
import java.io.InputStreamReader;                                               
                                                                                
public class row {                                                              
                                                                                
    public static void main(String args[]) throws IOException{                  
                                                                                
        BufferedReader inn = new BufferedReader(new                             
        InputStreamReader(System.in));                                          
        String[] arg = inn.readLine().split(" ");                               
                                                                                
        long k = Long.valueOf(arg[0]);                                          
        long a = Long.valueOf(arg[1]);                                          
        long b = Long.valueOf(arg[2]);                                          
                                                                                
        inn.close();                                                            
                                                                                
        int result = 0;                                                         
                                                                                
        for(long i=0; i<k; i++){                                                
            if((a+i)%k==0)                                                      
            {                                                                   
                a=a+i;                                                          
                break;                                                          
            }                                                                   
        }                                                                       
                                                                                
        for(long i=a; i<b+1; i+=k){                                             
            int sum=0;                                                          
            long digits=i;                                                      
            long rest=0;                                                        
            while(digits>0){                                                    
            rest = digits%10;                                                   
            sum += rest*rest;                                                   
            digits /= 10;                                                       
            }                                                                   
            if(sum*k==i){                                                       
                result ++;                                                      
            }                                                                   
        }                                                                       
        System.out.println(result);                                             

        System.exit(0);                                                         
                                                                                
    }                                                                           
}