class Yukicoder
  def initialize
    n = gets.chomp.to_i
    hash = Hash.new(0)

    n.times do
      eto = gets.chomp
      hash[eto] += 1
    end

    hash = hash.sort_by{|k,v| -v}.to_h.values

    if hash[0] > (n/2.0).ceil
      puts "NO"
    else
      puts "YES"
    end
  end
end

Yukicoder.new