deleted: Additional Exercises/Easy 346. Moving Average from Data Str…

…eam.py

	deleted:    Additional Exercises/Easy 408. Valid Word Abbreviation.py
	deleted:    Additional Exercises/Easy 680. Valid Palindrome II.py
	deleted:    Additional Exercises/Easy 938. Range Sum of BST.py
	deleted:    Additional Exercises/Hard 691. Stickers to Spell Word.py
	deleted:    Additional Exercises/Medium 1249. Minimum Remove to Make Valid Parentheses.py
	deleted:    Additional Exercises/Medium 129. Sum Root to Leaf Numbers.py
	deleted:    Additional Exercises/Medium 138. Copy List with Random Pointer.py
	deleted:    Additional Exercises/Medium 1570. Dot Product of Two Sparse Vectors.py
	deleted:    Additional Exercises/Medium 1650. Lowest Common Ancestor of a Binary Tree III.py
	deleted:    Additional Exercises/Medium 1762. Buildings with an Ocean View.py
	deleted:    Additional Exercises/Medium 2. Add Two Numbers.py
	deleted:    Additional Exercises/Medium 215. Kth Largest Element in an Array.py
	deleted:    Additional Exercises/Medium 227. Basic Calculator.py
	deleted:    Additional Exercises/Medium 314. Binary Tree Vertical Order Traversal.py
	deleted:    Additional Exercises/Medium 339. Nested List Weight Sum.py
	deleted:    Additional Exercises/Medium 426. Convert Binary Search Tree to Sorted Doubly Linked List.py
	deleted:    Additional Exercises/Medium 50. Pow(x, n).py
	deleted:    Additional Exercises/Medium 528. Random Pick with Weight.py
	deleted:    Additional Exercises/Medium 708. Insert into a Sorted Circular Linked List.py
	deleted:    Additional Exercises/Medium 71. Simplify Path.py
	deleted:    Additional Exercises/Medium 763. Partition Labels.py
	deleted:    Additional Exercises/Medium 791. Custom Sort String.py
	deleted:    Additional Exercises/Medium 841. Keys and Rooms.py
	deleted:    Additional Exercises/Medium 921. Minimum Add to Make Parentheses Valid.py
	modified:   README.md