N = int(input())
A = list(map(int,input().split()))
m = []
p = []
for a in A:
	if a > 0:
		p.append(a)
	elif a < 0:
		m.append(a)
p.sort(reverse = True)
m.sort()

while True:
	if not m:
		if len(p) > 1:
			print('No')
		else:
			print('Yes')
		exit()
	if not p:
		if len(m) > 1:
			print('No')
		else:
			print('Yes')
		exit()
	u = m.pop()
	v = p.pop()
	if u + v > 0:
		p.append(u + v)
	elif u + v < 0:
		m.append(u + v)