input: Write a function to compute the sum of two variables and store the result in a third variable. If the inputs are integers, return the sum; otherwise, return 'Invalid Input'.
  assert compute_sum(5, 8) == 13
  assert compute_sum('5', '8') == 'Invalid Input'
  assert compute_sum(-5, 10) == 5
  assert compute_sum(0, 0) == 0
  assert compute_sum(1.5, 2.5) == 4.0
output: def compute_sum(a, b):
      if isinstance(a, int) and isinstance(b, int):
          return a + b
      else:
          return 'Invalid Input'