Nina07

global min_diff, ans_for_mindiff

def permute(start, end, hole_depth, column_height, colors, col_index_params):
    if start == end:
        global min_diff, ans_for_mindiff
        N = len(col_index_params)
        new_height = [column_height[col_index_params[i]] - hole_depth[i] for i in range(N)]
        new_color = [colors[col_index_params[i]] for i in range(N)]
        diff, max_diff = 0, 0
        # diff in consecutive columns

Nina07

class WaveSort
  def initialize(ary)
    @input_ary = ary
  end

  # OPTIMIZED, checking current value against the next/prev element
  def wave_sort_optimized
    ary_len = @input_ary.length
    (0...@input_ary.length).step(2) do |i|
      if (i > 0) && (@input_ary[i] > @input_ary[i-1])