Count median in interval list

Last updated: November 6, 2025

Quick Overview

Count the number of maximum path in the given linked list.

Shopify
Coding & Algorithms
Software Engineer
Shopify
November 6, 2025
Software Engineer
Phone Screen
Coding & Algorithms
Medium

10

10

3,164 solved


Count the number of maximum path in the given linked list.

Shopify uses this problem in the Phone Screen to evaluate your algorithmic thinking. They expect you to discuss multiple approaches, analyze trade-offs between them, and implement the optimal solution with clean, readable code.

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
Data structure selection and trade-offs
Edge cases and input validation
Time and space complexity analysis
Hash maps and frequency counting
How to Approach This
  1. Clarify input constraints and edge cases before writing code.
  2. Walk through your approach verbally and confirm with the interviewer before coding.
  3. Start with a brute force solution, then optimize. Mention time and space complexity.
  4. Test your solution with examples, including edge cases like empty input or duplicates.
  5. Consider common patterns: sliding window, two pointers, hash map, BFS/DFS, dynamic programming.
Possible Follow-up Questions
  • What if the input doesn't fit in memory?
  • How would you test this solution thoroughly?
  • Can you optimize the space complexity of your solution?
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