import sys

# sys.setrecursionlimit(200005)
# sys.set_int_max_str_digits(200005)
int1 = lambda x: int(x)-1
pDB = lambda *x: print(*x, end="\n", file=sys.stderr)
p2D = lambda x: print(*x, sep="\n", end="\n\n", file=sys.stderr)
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI1(rows_number): return [LI1() for _ in range(rows_number)]
def SI(): return sys.stdin.readline().rstrip()

dij = [(0, 1), (-1, 0), (0, -1), (1, 0)]
# dij = [(0, 1), (-1, 0), (0, -1), (1, 0), (1, 1), (1, -1), (-1, 1), (-1, -1)]
# inf = -1-(-1 << 31)
inf = -1-(-1 << 62)

# md = 10**9+7
md = 998244353

n=II()
aa=LI()

if n==1:
    print("Yes")
    exit()

bb,cc=[],[]
for a in aa:
    if a>0:bb.append(a)
    elif a<0:cc.append(a)

if len(bb)+len(cc)<2:
    print("Yes")
    exit()

if not bb or not cc:
    print("No")
    exit()

bb.sort(reverse=True)
cc.sort()

s=0
while bb and cc:
    if s>0:
        s+=cc.pop()
    else:
        s+=bb.pop()

while s<=0 and bb:s+=bb.pop()
while s>=0 and cc:s+=cc.pop()
if bb or cc:
    print("No")
else:
    print("Yes")