aslf010990's blog

Fibonacci
By aslf010990, 9 years ago, In English

Hello, I have a question as to calculate the term x of the fibonacci suceción ?, the problem is that x may be a number between 1 and 10000, I try to calculate with recursion but takes a long time, me You Might support with some other method to calculate, thank you.

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9 years ago, # |
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Would need big int though.

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9 years ago, # |
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Try matrix exponentation. Complexity with Binary pow is LOG(N). To get n-th Fibonacci number raise matrix to nth deegree.

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