input: def dict_sum(dictionary: dict) -> int:
      """ Compute the sum of the values of a given dictionary.
      >>> dict_sum({'A': 5, 'B': 6, 'C': 10})
      21
      >>> dict_sum({'X': 3, 'Y': 7, 'Z': 0})
      10
      """
output:     return sum(dictionary.values())