def findPeak(input)
  peaks = []
  input.each_cons(3) do |x, y, z|
    if x < y and y > z
      peaks << y
    end
  end

  if peaks.size > 1
    puts "Found multiple peaks: #{peaks}"
  else
    puts "Found a peak at #{peaks[0]}"
  end
end

findPeak([1, 2, 3, 1])
findPeak([1, 2, 1, 3, 5, 6, 4])