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Algorithms Interview Tips
Yunkai's Top 5 Tips
Don’t be shy.  Ask clarifying questions and think out loud. Just like at work, if you don’t have enough information to form a solution, ask additional questions and validate your assumptions.
Use a brute force solution first.  Then further refine to get to the optimal solution.
Work through real examples to identify a better solution.  Think through various real-life use cases that you’ll need to account for.
Double check your Big-O analysis.  Pay attention to hidden cost that blows up the time complexity. Differentiate average time complexity vs. worst time complexity. On that last note, don’t forget to test for edge cases either.
HashMap is often your friend.  HashMap is rarely covered in data structure textbooks, but used very often in real code. Learn how to use and apply HashMap to solve algorithm questions in interviews.
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