Array Exercises

• Longest Substring Without Repeating Characters (solution) (use sliding window)
• Merge Sorted Arrays (use sliding pointers) (solution)
• Two Sum (build hash of elem, idx then look up hash) (solution)
• Best Time to Buy and Sell Stock (solution) (use sliding window but, when price decreases compared to window start, slide window completely)

References

• Tech Interview Handbook - Algorithms

Other

• Algorithms Practice
• Engineering Skills