Armstrong Number Detector

An Armstrong number (also known as a narcissistic number) for a given number of digits n is a number that is equal to the sum of its own digits each raised to the power of n. For example, 153 is an Armstrong number because 1^3 + 5^3 + 3^3 = 153. Input format: - A single integer n (1 ≤ n ≤ 1000). Output format: - Return a list of Armstrong numbers up to n (inclusive) in ascending order. Example: Input: 1000 Output: [0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 153, 370, 371, 407]