n = gets.to_i
v_l = gets.chomp.split.map(&:to_i) + [0, 0]


dp = Array.new(n+2) { Array.new(2, 0) }
dp[0][0], dp[1][0], dp[2][0] = v_l[0], v_l[1], v_l[0] + v_l[2]
dp[2][1] = 1

3.upto(n-1) do |i|
  if dp[i-3][0] >= dp[i-2][0]
    dp[i][0] = v_l[i] + dp[i-3][0]
    dp[i][1] = i-2
  else
    dp[i][0] = v_l[i] + dp[i-2][0]
    dp[i][1] = i-1
  end
end

next_i = n
path = []
while next_i > 0
  path.unshift next_i
  next_i = dp[next_i-1][1]
end
puts dp[n-1][0]
puts path.join('  ')