def dfs(l,r)
  return l if l + 1 == r
  if r - l <= 3
    (l ... r).to_a
  else
    mid = (r + l) / 2
    [mid, dfs(l, mid), dfs(mid + 1, r)]
  end
end

K = gets.to_i
p dfs(1, 1 << K).flatten