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January 31, 2019 22:06
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This is the formula I followed up -> Fn = {[(√5 + 1)/2] ^ n} / √5
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| import math | |
| def fib(n): | |
| return int(round(pow(((1 + math.sqrt(5)) / 2), n) / math.sqrt(5))) | |
| # complexity O(n) | |
| # space O(n) |
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