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#include <iostream>
#include <string>
#include <sstream>
using namespace std;

int foo(long long x, long long k1){
	long long q,sum=0;
	int p;
	stringstream ss;
	ss << x;
	string S=ss.str();
	p=S.length();
	for(int i=0;i<p;i++){
		q=S[i]-'0';
		sum+=q*q;
		if(sum>x)return 0;
	}
	if(k1*sum!=x)return 0;
	return 1;
};

int main(){
	long long k,a,b,d,retval=0;
	cin>>k;
	cin>>a;
	cin>>b;
	d=a%k;
	if(d==0)d=k;
	for(long long i=a-d+k;i<=b;i+=k){
		retval+=foo(i,k);
	}
	cout<<retval<<endl;
return 0;
}