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sauron/fibo.rb

Created December 5, 2013 22:37
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Fibonacci Loves maths :D
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fibo.rb
def fibo(n)
root5=Math.sqrt(5)
phi=0.5+(root5/2)
Integer(0.5+phi**n/root5)
end
puts fibo(ARGV.first.to_i)
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