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@tt-ht tt-ht commented Jul 22, 2022

Hash Table Practice

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Comprehension Questions

Question Answer
Why is a good Hash Function Important?
How can you judge if a hash function is good or not?
Is there a perfect hash function? If so what is it?
Describe a strategy to handle collisions in a hash table
Describe a situation where a hash table wouldn't be as useful as a binary search tree
What is one thing that is more clear to you on hash tables now

@chimerror
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Grabbing this to grade!

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@chimerror chimerror left a comment

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Good work!

I left a comment on your time complexity calculation for the top-K problem, but overall this shows sufficient mastery of the material for a Green!

In the case of a tie it will select the first occuring element.
Time Complexity: ?
Space Complexity: ?
Time Complexity: O(n)

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Note that max may end up going through every key-value pair in element_dict, of which there may be O(n) pairs, one for every number in nums. It may do this up to k times so the time complexity here is O(n + nk), of which that last part dominates for O(nk).

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2 participants