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Ports - Jillianne #22

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Ports - Jillianne #22

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a649e8a
completed assignment
jillirami Apr 18, 2019
4b6ea42
corrected for functionality
jillirami Apr 18, 2019
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16 changes: 13 additions & 3 deletions lib/fibonacci.rb
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Original file line number Diff line number Diff line change
Expand Up @@ -5,8 +5,18 @@
# ....
# e.g. 6th fibonacci number is 8

# Time complexity: ?
# Space complexity: ?
# Time complexity: O(n)
# Space complexity: O(n)
def fibonacci(n)
raise NotImplementedError
if n.nil? || n < 0
raise ArgumentError
else
sequence = [0, 1]
n.times do |i|
sequence[i + 2] = sequence[i] + sequence[i + 1]
end
fibonacci = sequence[n]
end

return fibonacci
end