Transform linked list to sorted array
Last updated: December 6, 2025
Quick Overview
Convert the given array to sorted result following the specified rules.
DE Shaw
Coding & Algorithms
Software Engineer
DE Shaw
December 6, 2025Software Engineer
Onsite
Coding & Algorithms
Hard
21
11
2,456 solved
Convert the given array to sorted result following the specified rules.
Coding interviews at DE Shaw focus on problem-solving approach as much as the final solution. The interviewer wants to see you break down the problem, consider edge cases, and optimize iteratively. Communication throughout the process is key.
What the Interviewer Expects
- Quickly identify the optimal approach and its theoretical basis
- Handle complex algorithm design with multiple interacting components
- Write concise, elegant code under time pressure
- Prove correctness of your approach and discuss alternative solutions
- Optimize beyond the obvious: discuss constant factor improvements
- Address follow-up variations and explain how the solution generalizes
Key Topics to Cover
Common algorithm patterns (sliding window, two pointers, BFS/DFS)
Data structure selection and trade-offs
Dynamic programming and memoization
Tree structures and recursion
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
- Can you solve this in a single pass?
- How would you modify your solution to handle streaming input?
- What is the worst-case input for your solution?
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Problem Analysis
The task is to transform a linked list into a sorted array. The linked list can be unsorted, and our goal is to extract the elements, sort them, and return them as an array. The optimal approach for t...
Approach
- Traverse the Linked List: Start from the head of the linked list and iterate through each node, collecting the values into an array. For example, if the linked list is 3 -> 1 -> 4, the collecte...
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