Implement Skip List with streaming input
Last updated: January 31, 2026
Quick Overview
Implement a Skip List data structure that supports insert, delete, and search operations with streaming input. The Skip List should allow for efficient insertion and retrieval of elements while maintaining a balanced structure, ensuring average time complexity of O(log n) for these operations. Your implementation should handle dynamic input and output the current state of the Skip List after each operation.
Uber
January 31, 202617
9
982 solved
Implement a Skip List data structure that supports insert, delete, and search operations with streaming input. The Skip List should allow for efficient insertion and retrieval of elements while maintaining a balanced structure, ensuring average time complexity of O(log n) for these operations. Your implementation should handle dynamic input and output the current state of the Skip List after each operation.
This coding problem is frequently asked during Onsite at Uber. The interviewer is testing your ability to translate a problem into clean, working code while discussing time and space complexity. Uber expects candidates to write production-quality code, not just solve the puzzle.
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
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 happens if the input contains duplicates?
- What is the worst-case input for your solution?
- How would you test this solution thoroughly?
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 implement a Skip List, which is a probabilistic data structure that allows for efficient search, insertion, and deletion operations, all of which should ideally have an aver...
Approach
To implement the Skip List, we will follow these steps:
- Node Structure: Create a
Nodeclass that holds a value and a list of pointers to the next nodes at each level. - **Skip List Structure...
Submit Your Answer
