Update README.md

Author: briandoyle81

README.md

@@ -64,7 +64,7 @@ Navigate into the `names` directory. Here you will find two text files containin
 
 Six seconds is an eternity so you've been tasked with speeding up the code. Can you get the runtime to under a second? Under one hundredth of a second?
 
-*You may not use the built in Python list or set for this problem*
+*You may not use the built in Python list, set, or dictionary for this problem*
 
 (Hint: You might try importing a data structure you built during the week)
 
@@ -93,7 +93,7 @@ While credit will be given for a functional solution, only optimal solutions wil
 | OBJECTIVE | TASK | 1 - DOES NOT MEET Expectations | 2 - MEETS Expectations | 3 - EXCEEDS Expectations | SCORE |
 | ---------- | ----- | ------- | ------- | ------- | -- |
 | _Student should be able to construct a queue and stack and justify the decision to use a linked list instead of an array._ | Task 1. Implement a Ring Buffer Data Structure | Solution in `ring_buffer.py` DOES NOT run OR it runs but has multiple logical errors, failing 3 or more tests | Solution in `ring_buffer.py` runs, but may have one or two logical errors; passes at least 7/9 tests | Solution in `ring_buffer.py` has no syntax or logical errors and passes 9/9 tests | |
-| _Student should be able to construct a binary search tree class that can perform basic operations with O(log n) runtime._ | Task 2. Runtime Optimization | Student does NOT correctly identify the runtime of the starter code in `name.py` and optimize it to run in under 6 seconds | Student correctly identifies the runtime of the starter code in `name.py` and optimizes it to run in under 6 seconds, with a solution of O(n log n) or better | Student does BOTH correctly identify the runtime of the starter code in `name.py` and optimizes it to run in under 6 seconds, with a solution of O(n) or better |  |
+| _Student should be able to construct a binary search tree class that can perform basic operations with O(log n) runtime._ | Task 2. Runtime Optimization | Student does NOT correctly identify the runtime of the starter code in `name.py` and optimize it to run in under 6 seconds | Student does not identify the runtime of the starter code in `name.py`, but optimizes it to run in under 6 seconds, with a solution of O(n log n) or better | Student does BOTH correctly identify the runtime of the starter code in `name.py` and optimizes it to run in under 6 seconds, with a solution of 0(n log n) or better |  |
 | _Student should be able to construct a linked list and compare the runtime of operations to an array to make the optimal choice between them._ | Task 3. Reverse the contents of a Singly Linked List | Student's solution in `reverse.py` is failing one or more tests | Student's solution in `reverse.py` is able to correctly print out the contents of the Linked List in reverse order, passing all tests, BUT, the runtime of their solution is not optimal (requires looping through the list more than once) | Student's solution in `reverse.py` is able to correctly print out the contents of the Linked List in reverse order, passing all tests AND it has a runtime of O(n) or better |  |
 | _Student should be able to write code that utilizes Python Collections_ | [STRETCH] Optimize code from Task 2, given the constraint that **only standard Python collections** may be used to store names | Level 1 solution provided | Level 2 solution provided | Level 3 solution provided |  |
 | **FINAL SCORE** | _(3 tasks + 1 STRETCH goal)_  | **0-5** | **6-9** | **10-12** |  |