import sys

sys.setrecursionlimit(200005)
int1 = lambda x: int(x)-1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LI1(): return list(map(int1, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]
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 = 10**16
md = 998244353
# md = 10**9+7

mx = 20005

n = II()
aa = LI()

dp = [0]*mx
dp[0] = 1

for a in aa:
    ndp = [0]*mx
    for i in range(-10000, 10001):
        ndp[i+a] += dp[i]
        ndp[i-a] += dp[i]
    dp = ndp

ans = 0
for i in range(-10000, 10001):
    ans += abs(i*dp[i])
    ans %= md

print(ans)