# Adbent Calendar Day1-1

array = [];
File.foreach("7_input.dat").with_index do |line, line_num|
  array.push(line)
end
positions = array[0].split(',').map(&:to_i)
# p positions

# p positions.size

# p positions.max

# p positions.min


i = positions.min
max = positions.max
cont = []
while i != max do
  e = 0
  positions.each do |n|
    if i != n then
      temp = 0
      a = (n-i).abs
      b = (n-i).abs + 1
      c = (a * b)/ 2
      e = e + c
    end
  end
  cont.push(e)
  puts "#{i} position: #{e} energy"
  i = i + 1
end

puts cont.min