import sys, time, random
from collections import deque, Counter, defaultdict
input = lambda: sys.stdin.readline().rstrip()
ii = lambda: int(input())
mi = lambda: map(int, input().split())
li = lambda: list(mi())
inf = 2 ** 61 - 1
mod = 998244353
from heapq import heappop, heappush
n = ii()
a = li()
t = []
a.sort()
for v in a:
    heappush(t, v)
    while len(t) >= 2 and t[-1] * t[-2] <= 0:
        x = heappop(t)
        y = heappop(t)
        heappush(t, x + y)

print('Yes' if len(t) == 1 else 'No')