T = gets.to_i

T.times do
  n = gets.to_i
  a = gets.split.map(&:to_i)
  memo = a.tally
  memo.default = 0

  a.each_cons(2) do |x, y|
    next if x != y

    if memo[0] > memo[1] && x == 0
      memo[0] -= 1
    end

    if memo[0] < memo[1] && x == 1
      memo[1] -= 1
    end
  end

  if memo[0] == memo[1]
    puts 'Yes'
  else
    puts 'No'
  end
end