An Armstrong number of three digits is an integer such that the sum of
the cubes of its digits is equal to the number itself. For example,
371 is an Armstrong number since 3**3 + 7**3 + 1**3 = 371.
Write a program to find all Armstrong number in the range of 0 and 999.
Write a program to find all Armstrong number in the range of 0 and 999.
