Find connected components in string
Last updated: December 29, 2025
Quick Overview
Given a string consisting of characters, identify and return all connected components, where a connected component is defined as a maximal substring of consecutive identical characters. The output should be a list of these components, preserving their order of appearance in the original string.
Jump Trading
December 29, 202517
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2,138 solved
Given a string consisting of characters, identify and return all connected components, where a connected component is defined as a maximal substring of consecutive identical characters. The output should be a list of these components, preserving their order of appearance in the original string.
Jump Trading uses this problem in the Onsite 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
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?
- What happens if the input contains duplicates?
- How would your solution change if the input was sorted?
- How would you modify your solution to handle streaming input?
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Practice DSA ProblemsSample Answer
Problem Analysis
In this problem, we need to identify connected components in a string, which are defined as maximal substrings of consecutive identical characters. The connected component concept indicates that we ca...
Approach
- Initialize an empty list to store the connected components.
- Use a pointer (or index) to iterate through the string.
- For each character, check if it is the same as the previous character. -...
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