Merge Three Sorted arrays
Last updated: September 2, 2025
Quick Overview
Given two sorted interval lists, merge them into a single sorted result.
Bloomberg
September 2, 20259
14
4,391 solved
Given two sorted interval lists, merge them into a single sorted result.
Coding interviews at Bloomberg 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
- Identify the correct data structure and algorithm for the problem
- Write clean, bug-free code with proper variable naming
- Analyze time and space complexity correctly
- Handle basic edge cases (empty input, single element)
- Communicate your thought process while coding
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 your solution change if the input was sorted?
- How would you parallelize this solution?
- What if the input doesn't fit in memory?
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Problem Analysis
To solve the problem of merging three sorted arrays, we can utilize the two pointers technique. This method is applicable here because we are dealing with sorted lists, which allows us to efficien...
Approach
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Initialize Pointers: Start with three pointers, each set to the beginning of the three arrays.
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Compare Elements: While any of the pointers have not reached the end of their respective ...
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