rotation on Binary Tree
Last updated: April 26, 2026
Quick Overview
Perform a partitioning on a binary tree and return the result.
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Perform a partitioning on a binary tree and return the result.
This coding problem is frequently asked during Technical Screen at LinkedIn. The interviewer is testing your ability to translate a problem into clean, working code while discussing time and space complexity. LinkedIn 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 test this solution thoroughly?
- How would your solution change if the input was sorted?
- Can you solve this in a single pass?
- How would you modify your solution to handle streaming input?
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Practice DSA ProblemsSample Answer
Problem Analysis
The problem revolves around performing a rotation on a binary tree. The key pattern to identify here is the Divide and Conquer approach, particularly because we need to partition the tree into sma...
Approach
- Identify the pivot: First, we need to determine the pivot node around which we will perform the rotation. This can be a fixed node or based on certain conditions (e.g., median value, specific d...
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