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Euclidean algorithm
By Duelist1234, history, 9 months ago, In English

What is the time complexity of the Euclidean Algorithm? Also please upvote im really down bad with the downvotes and i want to return to positive contribution. Edit: When i meant the contribution i was hoping to get massivly downvoted.

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9 months ago, # |
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$$$gcd(a, b)$$$ works in $$$log(a) + log(b)$$$ time

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    9 months ago, # ^ |
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    I see my comment got downvoted:( Can somebody please explain why it is $$$log(min(a, b))$$$? I always thought that every step one of the variables is decreased at least two times. Why am I wrong?

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9 months ago, # |
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Short answer: log(min(a, b)).

Long answer: Stack Overflow my beloved There are multiple explanations for why the time complexity may or may not be something. The case when A and B are very large numbers is also tackled. Really cool!

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9 months ago, # |
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Euclidean algorithm's time complexity is often denoted as O(log(min(a,b))).

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9 months ago, # |
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Auto comment: topic has been updated by Duelist1234 (previous revision, new revision, compare).

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