mo=998244353
n,*a=map(int,open(0).read().split())
N=sum(a)+1
d=[0]*N*2
d[0]=1
for x in a:
    nx=[0]*N*2
    for i in range(-N,N+1):
        if -N<=i-x<=N:nx[i-x]+=d[i]
        if -N<=i+x<=N:nx[i+x]+=d[i]
        nx[i-x]%=mo
        nx[i+x]%=mo
    d=nx[:]

ans=0
for i in range(-N,N+1):
    ans+=d[i]*abs(i)
    ans%=mo

print(ans)