mckomo/missing_integer.rb

Created December 27, 2014 13:02

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Codility – MissingInteger

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missing_integer.rb

	def solution(a)

	n = a.length
	r = (1 .. n).to_a

	diff = r - a

	if diff.empty?
	return n+1
	end

	diff.first

	end

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