Question

Consider this binary search tree: 14 / \ 2 16 / \ 1 5 / 4...

Consider this binary search tree:

       14        
       /  \ 
     2    16
    / \ 
  1   5
       /
      4

Suppose we remove the node with value 2. What will be the new tree?

       14
       /  \
     4    16
    / \
  1   5         
       14
       /  \
     5    16
    / \
  1   4          
       4
      /  \
    5    16
    /       /
  1      14                       
      14
      /  \
 Null  16
   / \
 1   5
 /
4
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Homework Answers

Answer #1

Given binary search tree

        14        
       /  \ 
     2    16
    / \ 
  1   5
      /
     4

If we remove node 2, we can update the tree in 2 ways.

way - 1: Replace 2 with the maximum value of left sub tree

way -2 : Replace 2 with the minimum value of right sub tree.

Accroding to way -2, option 1 is correct

        14
       /  \
     4    16
    / \
  1   5

2nd option is wrong. It is not satisfying binary search tree property.

3rd, 4th options are wrong because they have not forming trees based on the method mentioned above.

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