rotation on Binary Tree
Last updated: August 2, 2025
Quick Overview
Given a binary tree, perform a rotation operation on the tree, either to the left or to the right, based on the specified direction. The function should take the root of the binary tree and the direction of rotation as input, and return the new root of the rotated tree. Ensure that the rotation maintains the properties of the binary tree structure.
Anduril
August 2, 20253
7
694 solved
Given a binary tree, perform a rotation operation on the tree, either to the left or to the right, based on the specified direction. The function should take the root of the binary tree and the direction of rotation as input, and return the new root of the rotated tree. Ensure that the rotation maintains the properties of the binary tree structure.
This coding problem is frequently asked during Onsite at Anduril. The interviewer is testing your ability to translate a problem into clean, working code while discussing time and space complexity. Anduril expects candidates to write production-quality code, not just solve the puzzle.
What the Interviewer Expects
- Recognize the underlying problem pattern (sliding window, two pointers, BFS/DFS, etc.)
- Discuss multiple approaches and trade-offs before coding
- Implement an optimal solution with clean, production-quality code
- Handle all edge cases including boundary conditions and invalid input
- Optimize both time and space complexity with clear justification
- Test your solution systematically with well-chosen examples
Key Topics to Cover
How to Approach This
- Clarify input constraints and edge cases before writing code.
- Walk through your approach verbally and confirm with the interviewer before coding.
- Start with a brute force solution, then optimize. Mention time and space complexity.
- Test your solution with examples, including edge cases like empty input or duplicates.
- Consider common patterns: sliding window, two pointers, hash map, BFS/DFS, dynamic programming.
Possible Follow-up Questions
- How would you modify your solution to handle streaming input?
- What is the worst-case input for your solution?
- Can you solve this iteratively instead of recursively (or vice versa)?
Sharpen Your Skills on Codemia
Practice similar problems with our interactive workspace, get AI feedback, and track your progress.
Practice DSA ProblemsSample Answer
Problem Analysis
The problem requires us to perform a rotation operation on a binary tree, either to the left or to the right. This can be recognized as a tree manipulation problem, where the rotation operations funda...
Approach
To perform a rotation, we will define the rotation operations as follows:
- Left Rotation: Given a node, make its right child the new root. The original node becomes the left child of this new ro...
Submit Your Answer
