input: Write a function that takes in a dictionary (string → integer) and returns the sum of all values in the dictionary. The function should return the sum of the values in the dictionary. If the dictionary is empty, the function should 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({}) == 0
output: def compute_dict_sum(d):
      return sum(d.values())