func main()
	var n: int :: cui@inputInt()
	var h: int :: cui@inputInt()
	for i(0, n - 1)
		var a: int :: cui@inputInt()
		do h :: h / math@gcd(h, a)
	end for
	
	var ans: bool :: h = 1
	do cui@print(ans ?("YES\n", "NO\n"))
end func