n = gets.to_i
ps = gets.split.map(&:to_i)
q = []

pos = ps.map.with_index { [_1, _2] }.sort_by { _1[0] }.map { _1[1] }
pre = (0...(n - 1)).to_a.tap { _1.unshift nil }
nxt = (1..n).to_a.tap { _1[-1] = nil }

n.times do |i|
  now = pos[i]
  nx = nxt[now]
  next if ps[now].nil? || nx.nil? || ps[nx].nil?

  q.push ps[now], ps[nx]
  ps[now] = ps[nx] = nil
  nxt[pre[now]] = nxt[nx] unless pre[now].nil?
  pre[nxt[nx]] = pre[now] unless nxt[nx].nil?
end

puts q.join "\s"