input: ### Instruction:
  Write a function `print_staircase` that takes an integer `n` and prints a staircase of height `n`. The staircase should be made of the character `#` and should be right-aligned.
  
  ### Examples:
  assert print_staircase(5) == None
  assert print_staircase(3) == None
  assert print_staircase(0) == None
  assert print_staircase(1) == None
output:     for i in range(1, n + 1):
          print(' ' * (n - i) + '#' * i)