func main()
	var n: int :: cui@inputInt()
	var a: []int :: #[n]int
	for i(0, n - 1)
		do a[i] :: cui@inputInt()
	end for
	
	var ans: bool :: true
	for i(0, n - 1)
		if(a[i] + a[n - 1 - i] <> a[0] + a[n - 1])
			do ans :: false
		end if
	end for
	
	do cui@print((ans ?("Yes", "No")) ~ "\n")
end func