Dashboard Questions Topics Companies Sheets

Tree

Topic

236 coding problems covering Tree concepts. Master this topic and improve your problem-solving skills.

236

Problems

Easy

148

Medium

Hard

Difficulty

All236 Easy41 Medium148 Hard47

Title	Solve	Difficulty	Companies	Topics
427. Construct Quad Tree	Solve	Medium	Uber	Array Divide and Conquer+2
428. Serialize and Deserialize N-ary Tree	Solve	Hard	Amazon+7	Breadth-First Search Depth-First Search+2
429. N-ary Tree Level Order Traversal	Solve	Medium	Microsoft	Breadth-First Search Tree
431. Encode N-ary Tree to Binary Tree	Solve	Hard	-	Binary Tree Breadth-First Search+3
437. Path Sum III	Solve	Medium	DoorDash+3	Binary Tree Depth-First Search+1
449. Serialize and Deserialize BST	Solve	Medium	Amazon+2	Binary Search Tree Binary Tree+5
450. Delete Node in a BST	Solve	Medium	Amazon+4	Binary Search Tree Binary Tree+1
501. Find Mode in Binary Search Tree	Solve	Easy	Adobe+1	Binary Search Tree Binary Tree+2
508. Most Frequent Subtree Sum	Solve	Medium	Apple	Binary Tree Depth-First Search+2
510. Inorder Successor in BST II	Solve	Medium	Arista Networks+1	Binary Search Tree Binary Tree+1
513. Find Bottom Left Tree Value	Solve	Medium	Amazon+2	Binary Tree Breadth-First Search+2
515. Find Largest Value in Each Tree Row	Solve	Medium	Amazon+5	Binary Tree Breadth-First Search+2
530. Minimum Absolute Difference in BST	Solve	Easy	Bloomberg+3	Binary Search Tree Binary Tree+3
536. Construct Binary Tree from String	Solve	Medium	Facebook	Binary Tree Depth-First Search+3
538. Convert BST to Greater Tree	Solve	Medium	Amazon+2	Binary Search Tree Binary Tree+2
543. Diameter of Binary Tree	Solve	Easy	Amazon+5	Binary Tree Depth-First Search+1
545. Boundary of Binary Tree	Solve	Medium	Amazon+3	Binary Tree Depth-First Search+1
549. Binary Tree Longest Consecutive Sequence II	Solve	Medium	Google	Binary Tree Depth-First Search+1
558. Logical OR of Two Binary Grids Represented as Quad-Trees	Solve	Medium	-	Divide and Conquer Tree
559. Maximum Depth of N-ary Tree	Solve	Easy	Microsoft	Breadth-First Search Depth-First Search+1
563. Binary Tree Tilt	Solve	Easy	Indeed	Binary Tree Depth-First Search+1
572. Subtree of Another Tree	Solve	Easy	Amazon+3	Binary Tree Depth-First Search+3
582. Kill Process	Solve	Medium	Amazon+1	Array Breadth-First Search+3
589. N-ary Tree Preorder Traversal	Solve	Easy	Google	Depth-First Search Stack+1
590. N-ary Tree Postorder Traversal	Solve	Easy	Amazon	Depth-First Search Stack+1
606. Construct String from Binary Tree	Solve	Medium	Adobe+3	Binary Tree Depth-First Search+2
617. Merge Two Binary Trees	Solve	Easy	Amazon+3	Binary Tree Breadth-First Search+2
623. Add One Row to Tree	Solve	Medium	Amazon+2	Binary Tree Breadth-First Search+2
637. Average of Levels in Binary Tree	Solve	Easy	Amazon+2	Binary Tree Breadth-First Search+2
652. Find Duplicate Subtrees	Solve	Medium	Amazon+2	Binary Tree Depth-First Search+2
653. Two Sum IV - Input is a BST	Solve	Easy	Amazon+1	Binary Search Tree Binary Tree+5
654. Maximum Binary Tree	Solve	Medium	Amazon	Array Binary Tree+4
655. Print Binary Tree	Solve	Medium	Amazon+1	Binary Tree Breadth-First Search+2
662. Maximum Width of Binary Tree	Solve	Medium	Amazon+4	Binary Tree Breadth-First Search+2
663. Equal Tree Partition	Solve	Medium	Amazon	Binary Tree Depth-First Search+1
666. Path Sum IV	Solve	Medium	Alibaba+1	Array Binary Tree+3
669. Trim a Binary Search Tree	Solve	Medium	Amazon+3	Binary Search Tree Binary Tree+2
671. Second Minimum Node In a Binary Tree	Solve	Easy	LinkedIn	Binary Tree Depth-First Search+1
687. Longest Univalue Path	Solve	Medium	Amazon+1	Binary Tree Depth-First Search+1
690. Employee Importance	Solve	Medium	Apple+1	Array Breadth-First Search+3
700. Search in a Binary Search Tree	Solve	Easy	Amazon	Binary Search Tree Binary Tree+1
701. Insert into a Binary Search Tree	Solve	Medium	Amazon+2	Binary Search Tree Binary Tree+1
703. Kth Largest Element in a Stream	Solve	Easy	Adobe+4	Binary Search Tree Binary Tree+4
742. Closest Leaf in a Binary Tree	Solve	Medium	Facebook	Binary Tree Breadth-First Search+2
776. Split BST	Solve	Medium	Google	Binary Search Tree Binary Tree+2
783. Minimum Distance Between BST Nodes	Solve	Easy	Bloomberg+3	Binary Search Tree Binary Tree+3
814. Binary Tree Pruning	Solve	Medium	Apple+1	Binary Tree Depth-First Search+1
834. Sum of Distances in Tree	Solve	Hard	Google+2	Depth-First Search Dynamic Programming+2
863. All Nodes Distance K in Binary Tree	Solve	Medium	Amazon+18	Binary Tree Breadth-First Search+3
865. Smallest Subtree with all the Deepest Nodes	Solve	Medium	Amazon+2	Binary Tree Breadth-First Search+3