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#include <cstdio>

int f(long long n){
	int ret=0;
	while(n){
		int md=n%10;
		ret+=md*md;
		n/=10;
	}
	return ret;
}

int main(){
	long long k,a,b;
	scanf("%lld %lld %lld\n",&k,&a,&b);
	int cnt=0;
	for(long long y=1;y<2000;y++){
		long long n=k*y;
		if(k==n/y && k*f(n) == n && a<=n && n<=b){
			cnt++;
		}
	}
	printf("%d\n",cnt);
}