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Computer Science 61B - Fall 1997 - Yelick - Midterm 2

Computer Science 61B - Fall 1997 - Yelick - Midterm 2 -...

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CS61B Midterm 2 Fall 1997 CS61B Midterm 2 Fall 1997 1) (2 points) Given the following BST, show its value after deleting 95. 2) (2 points) Given a BST, there are some keys that, if inserted will increase the height of the tree. For the BST below, list all the integer keys (distinct from those already in the tree) for which this is true. If no such keys exist, explain why not. (Each key should increase the height if inserted alone, not with other keys.) 3) (4 points) For a given set of keys there are many possible BSTs. Right and left rotations (as defined for Red-Black trees), produce legal BSTs from others. For the BST given below, give another BST with the same keys that CANNOT be formed by performing a sequence of left and right rotations on T. If no such tree exists, explain why not. :34 PM file:///C|/Documents%20and%20Settings/Jason%20Rafte...0-%20Fall%201997%20-%20Yelick%20-%20Midterm%202.htm (1 of 6)1/27/2007 5:40
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CS61B Midterm 2 Fall 1997 4) (2 points) Given the following Red-Black tree, show its value after inserting the key 29. (Mark the red nodes with an "R" and black nodes with "B" and show the black nulls at the leaves as in your homework assignment.
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