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#include <cstdio>

int main()
{
  long long a, b, i, k, n, sqrsum, result = 0;

  scanf ("%lld %lld %lld", &k, &a, &b);
  for (i = 1; i <= 1458; ++i) {
    n = k * i;
    sqrsum = 0;
    while (n > 0) {
      sqrsum += (n % 10) * (n % 10);
      n /= 10;
    }
    if (i == sqrsum && a <= k * i && k * i <= b)
      result++;
  }
  printf ("%lld", result);
  
  return 0;
}