Check out the top trees and graphs data structure interview questions asked in interviews of top tech companies like Amazon, only on CodeStudio. Start Practicing now!

Problem Title

Difficulty

Avg Time to solve

Attempted

Flatten Binary Tree to Linked List

6

Moderate

25 mins

564

Path Sum lll

5

Hard

50 mins

76

Range Sum of BST

0

Easy

20 mins

111

BST to sorted DLL

17

Moderate

50 mins

184

Populating Next Right Pointers In Each Node

2

Moderate

25 mins

90

Merge Two Binary Trees

2

Easy

15 mins

112

Convert Sorted Array to BST

5

Easy

15 mins

314

Print Binary Tree

7

Moderate

30 mins

12

Minimum Cost Tree From Leaf Nodes

3

Hard

20 mins

52

Distributing Coins

2

Moderate

45 mins

63

Maximum Binary Tree

0

Moderate

10 mins

33

Construct Binary Tree from Inorder and Postorder Traversal

10

Moderate

25 mins

399

Unique Binary Search Trees

3

Moderate

20 mins

76

Ninja And The Tree

2

Hard

45 mins

24

Populating Next Right Pointers in Each Node II

1

Moderate

20 mins

40

Number Of Good Leaf Nodes Pairs

3

Easy

15 mins

21

BALLOONS GAME

3

Easy

10 mins

116

Break The Tree

2

Moderate

30 mins

38

Insert Into A Binary Search Tree

7

Easy

20 mins

221

Create a binary tree from postorder and preorder traversal

5

Moderate

15 mins

35

Lowest Common Ancestor of a Binary Tree III

2

Moderate

25 mins

109

Delete Nodes And Return Forest

4

Moderate

20 mins

28

Equal Tree Partition

3

Moderate

15 mins

111

House Robber III

0

Moderate

35 mins

32

Check Whether Binary tree Is Complete

0

Moderate

25 mins

47

Flatten Binary Tree to Linked List

Moderate

6 upvotes

Path Sum lll

Hard

5 upvotes

Range Sum of BST

Easy

0 upvotes

BST to sorted DLL

Moderate

17 upvotes

Populating Next Right Pointers In Each Node

Moderate

2 upvotes

Merge Two Binary Trees

Easy

2 upvotes

Convert Sorted Array to BST

Easy

5 upvotes

Print Binary Tree

Moderate

7 upvotes

Minimum Cost Tree From Leaf Nodes

Hard

3 upvotes

Distributing Coins

Moderate

2 upvotes

Maximum Binary Tree

Moderate

0 upvotes

Construct Binary Tree from Inorder and Postorder Traversal

Moderate

10 upvotes

Unique Binary Search Trees

Moderate

3 upvotes

Ninja And The Tree

Hard

2 upvotes

Populating Next Right Pointers in Each Node II

Moderate

1 upvote

Number Of Good Leaf Nodes Pairs

Easy

3 upvotes

BALLOONS GAME

Easy

3 upvotes

Break The Tree

Moderate

2 upvotes

Insert Into A Binary Search Tree

Easy

7 upvotes

Create a binary tree from postorder and preorder traversal

Moderate

5 upvotes

Lowest Common Ancestor of a Binary Tree III

Moderate

2 upvotes

Delete Nodes And Return Forest

Moderate

4 upvotes

Equal Tree Partition

Moderate

3 upvotes

House Robber III

Moderate

0 upvotes

Check Whether Binary tree Is Complete

Moderate

0 upvotes

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