input: Write a function to take a dictionary where keys are strings and values are integers, and return the sum of all integer values in the dictionary. If the dictionary is empty, return 0.
  assert compute_dict_sum({"a": 5, "b": 10, "c": 15}) == 30
  assert compute_dict_sum({"x": 1, "y": 2, "z": 3}) == 6
  assert compute_dict_sum({"p": 0, "q": 0, "r": 0}) == 0
  assert compute_dict_sum({}) == 0
  assert compute_dict_sum({"single": 100}) == 100
  assert compute_dict_sum({"a": -5, "b": 5, "c": 10}) == 10
output: def compute_dict_sum(d):
      return sum(d.values()) if d else 0