17. BST Insert

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Input: root = [4,2,7,1,3], val = 5

Output: [4,2,7,1,3,5]

Explanation: The value 5 is inserted as the right child of 3.

Input: root = [40,20,60,10,30,50,70], val = 25

Output: [40,20,60,10,30,50,70,null,null,25]

Explanation: The value 25 is inserted as the right child of 20.

Input: root = [4,2,7,1,3,null,null,null,null,null,null], val = 5

Output: [4,2,7,1,3,5]

Explanation: The value 5 is inserted as the right child of 3.

Time Complexity

O(log n)

Space Complexity

O(h)