import sys
input = lambda :sys.stdin.readline()[:-1]
ni = lambda :int(input())
na = lambda :list(map(int,input().split()))
sys.setrecursionlimit(10**7)
yes = lambda :print("yes");Yes = lambda :print("Yes");YES = lambda : print("YES")
no = lambda :print("no");No = lambda :print("No");NO = lambda : print("NO")
#######################################################################

n = ni()
a = na()
M = 10101
dp = [0 for j in range(M)]
dp[0] = 1
for i in range(n):
    ndp = [0]*M
    for j in range(M):
        if j+a[i]<M:
            ndp[(j+a[i])]+=dp[j]
        ndp[abs(j-a[i])]+=dp[j]
    dp = ndp.copy()

ans = 0
mod = 998244353
for i in range(M):
    ans+=i*dp[i]
    ans%=mod
print(ans)