How to Solve Coding Interview Problems Faster Using a Browser Extension

You are staring at a LeetCode problem. The description is four paragraphs long, mentions three edge cases, and includes a constraint table you need to cross-reference with the examples. You understand each sentence individually, but the overall approach is not clicking.

This is not a coding problem. It is a reading comprehension problem. And it happens to almost every developer during interview prep — especially when English is not their first language or the problem statement is deliberately convoluted.

What if you could highlight the problem description, press a keyboard shortcut, and instantly get a structured breakdown: the core task, the constraints that actually matter, the edge cases to watch for, and a suggested approach — all formatted exactly the way you think about algorithms?

That is exactly what a custom preset in 5MinRead does. And here is how to set it up.

The Problem With Coding Challenge Descriptions

Coding platforms write their problems in a specific style. They are precise (because they have to be) but rarely clear (because that would make the problem too easy). The result is descriptions that are optimized for automated test validation, not for human understanding.

Consider a typical medium-difficulty problem:

Given an array of integers nums and an integer target, return indices of the two numbers such that they add up to target. You may assume that each input would have exactly one solution, and you may not use the same element twice. You can return the answer in any order.

Simple enough. But at hard difficulty, you get paragraphs of conditions, nested constraints, and examples that take longer to parse than to solve. Interview stress makes it worse — your reading comprehension drops by an estimated 20-30% under time pressure.

This is where 5MinRead becomes your unfair advantage.

Step 1: Set Up the Keyboard Shortcut

5MinRead activates with Ctrl+Shift+Z (or Cmd+Shift+Z on Mac). This opens the extension popup on any page — including LeetCode, HackerRank, CodeSignal, or any coding platform.

But the real power move is using text selection. Here is the workflow:

1. Select the problem description on the page (just the text, not the code editor)
2. A floating popup appears with quick actions
3. Click Summarize or Explain to process just the selected text

This means you do not need to summarize the entire page. You can target exactly the problem statement and ignore the discussion section, hints you do not want yet, and boilerplate.

Tip: You can customize or disable the selection popup in Settings → Show Popup on Text Selection. See the Selection documentation for details.

Step 2: Create a “Code Interview Solver” Custom Preset

This is where it gets powerful. Instead of using a generic summary format, you can create a custom preset specifically designed for coding problems.

Go to the dashboard, navigate to Presets, and click Create Preset. Here is the configuration:

Name: Code Interview Solver

Icon: ⚡ (or any icon that helps you spot it quickly)

System Prompt:

You are a senior software engineer helping someone prepare for coding interviews.

Analyze the given coding problem and provide:

1. **Core Task** — One sentence: what exactly needs to be computed or returned
2. **Input/Output** — Types and formats, stripped of narrative fluff
3. **Constraints That Matter** — Only the ones that affect algorithm choice (array size → O(n) vs O(n²), value ranges → overflow risk, etc.)
4. **Edge Cases** — List the tricky inputs the problem is testing for
5. **Pattern Recognition** — Which known algorithm pattern does this map to? (Two pointers, sliding window, BFS/DFS, dynamic programming, binary search, greedy, etc.)
6. **Suggested Approach** — 3-5 step pseudocode outline, not full code
7. **Complexity Target** — Expected time and space complexity based on constraints

Be concise. Use bullet points. Do not write actual code — the goal is understanding, not a copy-paste solution.

Click Create. Your preset now appears in the preset selector in both the extension popup and the dashboard.

Note: Free users can create up to 3 custom presets. Pro and Max plans allow unlimited presets. See Presets documentation for full details.

Step 3: The Actual Workflow (30 Seconds)

Here is how it works in practice during interview prep:

1. Open the problem page on LeetCode / HackerRank / Codeforces / any platform
2. Select the problem description text
3. Click Summarize from the floating popup (or press Ctrl+Shift+Z to open the extension)
4. Choose your “Code Interview Solver” preset from the dropdown
5. Read the structured breakdown — core task, pattern, approach, edge cases

That is it. In 30 seconds, you have a clear mental model of what the problem is asking, which algorithm family it belongs to, and what traps to watch for.

Real Example: “Minimum Window Substring” (LeetCode Hard)

The original problem description is 200+ words with examples and constraints. After running it through the Code Interview Solver preset:

• Core Task: Find the shortest substring of s that contains all characters of t
• Pattern: Sliding window with character frequency map
• Constraints That Matter: s length up to 10^5 → O(n) required, characters are uppercase + lowercase English letters
• Edge Cases: t longer than s (return ""), duplicate characters in t, t is a single character
• Suggested Approach: Expand right pointer until all chars found → shrink left pointer to minimize → track global minimum
• Complexity Target: O(n) time, O(k) space where k = character set size

That breakdown took longer to read than it took the AI to generate it.

Step 4: Use Chat for Follow-Up Questions

After the initial breakdown, you might have questions:

• “Why sliding window instead of two pointers?”
• “What if I miss the edge case where t has duplicates?”
• “Can you explain the shrink step in more detail?”

Switch to the Ask tab in the extension popup and type your question. The AI has the full context of the problem and will answer based on the original text — not generic advice.

This is particularly useful for:

• Understanding why a certain pattern applies (not just which one)
• Exploring alternative approaches and their trade-offs
• Clarifying constraint implications you might have missed

See the Chat documentation for more on follow-up questions.

Advanced: More Presets for Different Prep Stages

Once you see the pattern, you can create multiple presets for different stages of your prep:

“Complexity Analyzer” Preset

Analyze the given algorithm or code and determine:
1. Time complexity with step-by-step derivation
2. Space complexity (auxiliary vs total)
3. Whether the complexity is optimal for the given constraints
4. If not optimal, what theoretical lower bound exists

”Test Case Generator” Preset

Given a coding problem description, generate:
1. 3 basic test cases that verify the happy path
2. 3 edge cases (empty input, single element, maximum size)
3. 2 tricky cases that commonly cause wrong answers
Format: Input → Expected Output, one per line

”Code Review Interview” Preset

Review the given code as a senior engineer would in a technical interview:
1. Correctness — does it handle all cases?
2. Efficiency — time and space complexity
3. Code quality — naming, structure, readability
4. What follow-up questions would an interviewer ask?

Why This Works Better Than ChatGPT

You might think: “I can just paste the problem into ChatGPT.” You can. But there are three reasons this workflow is better for interview prep:

1. Speed — Selecting text and clicking a button is faster than switching tabs, pasting, and waiting for a response. During timed practice, those 30 seconds matter.

2. Consistency — Your custom preset produces the same structured output every time. No need to re-explain what format you want. After 50 problems, you have trained yourself to think in that structure.

3. Context stays on the page — You are reading the AI breakdown right next to the problem. No tab-switching, no losing your place, no context fragmentation. Your eyes stay where the code needs to be written.

4. Language support — If you prep in your native language, 5MinRead supports 15 languages. The breakdown comes in the language of your interface, even if the problem is in English.

The Bigger Picture: Presets as Thinking Frameworks

A custom preset is not just a summarization format. It is a thinking framework you encode once and reuse infinitely. The Code Interview Solver preset works because it mirrors how experienced engineers actually approach problems:

1. Understand what is being asked (strip the narrative)
2. Identify constraints that affect approach (not all constraints matter equally)
3. Recognize the pattern (most problems are variations of known patterns)
4. Plan before coding (pseudocode, not code)

By encoding this framework into a preset, you are not cheating — you are practicing structured problem decomposition. After 100 problems with this preset, you will find yourself doing the same breakdown mentally, without needing the AI.

That is the best kind of tool: one that makes itself unnecessary over time.

Getting Started

1. Install 5MinRead from the Chrome Web Store
2. Create your Code Interview Solver preset (copy the prompt above)
3. Open your next LeetCode problem
4. Select the description → Summarize → Read the breakdown
5. Solve the problem with clarity

Your coding interview prep just got significantly more efficient. The bottleneck was never your coding ability — it was parsing the problem. Now that bottleneck is gone.