import sys
import math
from collections import deque,Counter
from sys import stdin

#sys.setrecursionlimit(10**7)
int1=lambda x: int(x)-1

inp=lambda :int(input())
mi=lambda :map(int,input().split())
li=lambda :list(mi())
mi1=lambda :map(int1,input().split())
li1=lambda :list(mi1())
mis=lambda :map(str,input().split())
lis=lambda :list(mis())

stinput=lambda :stdin.readline()[:-1]
stinp=lambda :int(stinput())
stmi=lambda :map(int, stdin.readline().split())
stli=lambda :list(stmi())
stmi1=lambda :map(int1, stdin.readline().split())
stli1=lambda :list(stmi1())
stmis=lambda :stdin.readline()[:-1]

pr=print

from collections import defaultdict
"""
#初期値 0
d=defaultdict(int)

#初期値 1
d=defaultdict(lambda:1)
"""

mod=10**9+7
Mod=998244353
INF=10**18
ans=0

n=int(input())
a=li()
d=defaultdict(int)
d[0]=1
for i in a:
  d2=defaultdict(int)
  for j in d:
    d2[j+i]+=d[j]
    d2[j-i]+=d[j]
  d=d2.copy()
for i in d2:
  ans+=d2[i]*abs(i)
print(ans%Mod)