Implement a PrefixMapSum class with the following methods
insert(key: str, value: int): Set a given key’s value in the map. If the key already exists, overwrite the value. sum(prefix: str): Return the sum of all values of keys that begin with a given prefix. For example, you should be able to run the following code: mapsum.insert(“columnar”, 3) assert mapsum.sum(“col”) == 3 mapsum.insert(“column”, 2) assert mapsum.sum(“col”) ==… Read More »