# frozen_string_literal: true

animals = gets.chomp.to_i.times.map { gets.chomp }

number = animals.size
numbers = animals.group_by(&:itself).map { |_, e| e.size }
too_manies = if number.even?
               numbers.reject { |i| 2 * i <= number }
             else
               numbers.reject { |i| 2 * i <= number + 1 }
             end

puts too_manies.size.zero? ? 'YES' : 'NO'