In this lab your goal is to implement standard operations on binary search trees, including insert and delete. See section 12.3 in the textbook. In this assignment the keys are integers.
The input contains one of the following commands on a line:
• i key — Insert key into the BST. For example, “i 2” means “Insert key 2 into the BST”.
• d key — Delete key from the BST. For example, “d 2” means “Delete key 2 from the BST”. Do nothing if the BST does not contain the key.
