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#include <cstdio>
using namespace std;
#define LL long long 

int f(LL n){
	int result = 0;
	while(n > 0){
		int digit = n % 10;
		result += digit * digit;
		n /= 10;
	}
	return result;
}

int main(){
	LL k, a, b;
	scanf("%lld%lld%lld", &k, &a, &b);
	int result = 0;
	for (int i = 1; i <= 18 * 81; i++){
		if (k * f((LL)(i*k)) == (LL)(i*k) && i*k >= a && i*k <= b)
			result++;
	}
	printf("%d\n", result);
}