def f()
n=gets.to_i
xs=gets.split(" ").map{|e| e.to_i}.reverse
s3=xs.sum
return "No" if s3%3!=0
s2=s3/3*2
s1=s3/3
sum1=0

xs.each{|x|
	m1=s1
	if sum1>=s2 then
		m1=s3-sum1
	end
	return "No" if m1<x
	sum1+=x
}
return "Yes"
end