Day 6.

Dependencies

• [2] XBZHQ672 Day 1 solution

Change contents

• file addition: day6.rb (----------)
  [2.7]
  +

  + def redist banks

  + fullest, index1 = banks.each_with_index.max{|a,b| a[0] <=> b[0] }

  + inc1 = fullest / banks.length

  + inc2 = inc1 + 1

  + ex = fullest % banks.length - 1

  + banks.each_with_index.map do |s,index|

  + inc = if (index - index1 - 1) % banks.length <= ex

  + inc2

  + else

  + inc1

  + end

  + c = if index == index1

  + 0

  + else

  + s

  + end

  + inc + c

  + end

  + end

  +

  + def until_cycle banks

  + Enumerator.new do |y|

  + cache = {}

  + while !cache.key? banks

  + cache[banks] = true

  + y.yield banks

  + banks = redist banks

  + end

  + end

  + end

  +

  +

  + initial_state = Enumerator.new do |y|

  + File.open(ARGV[0],"r") do |src|

  + src.each_line do |line|

  + line.split(/\s/).each do |word|

  + num = word.to_i

  + y.yield num if num

  + end

  + end

  + end

  + end.to_a

  +

  + puts until_cycle(initial_state).count