Top 50 Tree Coding Problems for Programming Interviews

Tree data structure consists of two nodes, right and left, and the nodes that don't have children, are known as leaf nodes. The article "Top 50 Tree Coding Problems for Programming Interviews" benefits you by providing good examples of every problem of the tree. It provides the problems from the basic to the expert level. It covers the core and important problems of trees.

Here is the list of Tree problems to excel in the Data Structure and Algorithms ?

Easy Problems

• Height of Binary Tree
• Symmetric Tree
• Maximum Depth of Binary Tree
• Minimum Depth of Binary Tree
• Identical Trees
• Invert Binary Tree
• Path Sum
• Binary Tree Paths
• Sum of Left Leaves
• Check if Tree is Balanced

Intermediate Problems

• Lowest Common Ancestor
• Serialize and Deserialize Binary Tree
• Flatten Binary Tree to Linked List
• Construct Binary Tree from Preorder and Inorder Traversal
• Binary Tree Level Order Traversal
• Zigzag Level Order Traversal
• Vertical Order Traversal
• Boundary Traversal of Binary Tree
• Diameter of Binary Tree
• Maximum Path Sum

Advanced Problems

• Binary Tree Maximum Path Sum
• Populate Next Right Pointers
• Recover Binary Search Tree
• Validate Binary Search Tree
• Kth Smallest Element in BST
• Binary Tree to Doubly Linked List
• Construct Binary Tree from Preorder and Inorder
• Construct Binary Tree from Inorder and Postorder
• Largest BST in Binary Tree
• Unique Binary Search Trees II

Expert Problems

• Longest Univalue Path
• Count Complete Tree Nodes
• Minimum Distance Between BST Nodes
• Delete Node in a BST
• Find Duplicate Subtrees
• Binary Tree Cameras
• Distribute Coins in Binary Tree
• Construct Binary Tree from String
• Maximum Width of Binary Tree
• Binary Tree Coloring Game