input: Write a function to compute the sum of all values in a given dictionary where keys are strings and values are integers. If the dictionary is empty return 0. The function should take one parameter, the input dictionary, and return the computed sum.
  
  assert compute_dict_sum({"a": 5, "b": 10, "c": 15})==30
  assert compute_dict_sum({"x": 3, "y": 7})==10
  assert compute_dict_sum({})==0
  assert compute_dict_sum({"one": 1, "two": 2, "three": 3})==6
output: def compute_dict_sum(input_dict):
      return sum(input_dict.values()) if input_dict else 0