import sys
input = sys.stdin.readline
N = int(input())
a = list(map(int, input().split()))
mod = 998244353

mx = max(a)
m = mx * N
ln = mx * N * 2 + 1
dp = [0] * ln
dp[m] = 1

for x in a:
  dp2 = [0] * ln
  for i in range(ln):
    if i - x in range(ln):
      dp2[i - x] += dp[i]
      dp2[i - x] %= mod
    if i + x in range(ln):
      dp2[i + x] += dp[i]
      dp2[i + x] %= mod
  dp = dp2[: ]

res = 0
for i in range(ln):
  x = i - m
  res += abs(x * dp[i])
  res %= mod
print(res)