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17 lines
428 B
Ruby
17 lines
428 B
Ruby
# Given an integer x and a sorted array a of N distinct integers,
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# design a linear-time algorithm to determine if there exists
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# two distinct indices i and j such that arr[i] + arr[j] == x
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# @param {Array[]} arr
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# @return {Boolean}
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def two_sum(numbers, sum)
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possible_integers = Set.new
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numbers.each do |number|
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return true if possible_integers.include? number
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possible_integers << sum - number
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end
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false
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end
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