Changes

== Commands ==

== Commands ==

The operations you will need to support can be gleaned from the [http://www.cs.umd.edu/users/meesh/420/part1/p10/node21.html input specification]:

The operations you will need to support can be gleaned from the [http://www.cs.umd.edu/users/meesh/420/part1/p11/node21.html input specification]:

* [[createCity]] and [[deleteCity]]: You will need to be able to register cities with and remove them from the data dictionary. No two cities can have the same coordinates or name.

* [[createCity]] and [[deleteCity]]: You will need to be able to register cities with and remove them from the data dictionary. No two cities can have the same coordinates or name.