def lscan; gets.split.map(&:to_i); end

n = gets.to_i
aa = lscan.sort
bb = aa.filter{|a| a > 0}

if bb[0] == bb[-1]
  puts 'Yes'
  exit
end

d = bb.each_cons(2).map{|l,r| r-l }.reduce(&:gcd)
m = n - bb.size

bb.each_cons(2) do |l, r|
  l += d
  while l < r
    m -= 1
    l += d
    if m < 0
      puts 'No'
      exit
    end
  end
  if l != r
    puts 'No'
    exit
  end
end

puts 'Yes'