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#include<cstdio>

int sum(long long n){
	int k = 0;
	while(n > 0){
		k += (n % 10) * (n % 10);
		n /= 10;
	}
	return k;
}



int main(){
	long long a, b, k, result = 0;
	scanf("%lld %lld %lld", &k, &a, &b);
	
	for(long long i = (a % k == 0 ? a : a + k - (a % k)); i <= b && i <= (k < 1e15 ? 1458 * k : 1e18); i += k)
		if(i/k == sum(i))
			result++;
	
	printf("%lld", result);		
	
	return 0;
}