~/boss / two-potions
Two sum with a hash map
The Potion Shelf
Find the two potions that make 100. One walk down the shelf.
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How to beat it
Carry a notebook of potions you've seen. For each potion, look up its partner: 100 minus it. In the notebook? That's the pair. Not there? Write this potion down and walk on.
Now the real boss
Interviews ask for the code. Watch it run, then write it yourself, tested in Python, C++ or Java.
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