import numpy as np

N = int(input())
A = map(int, input().split())
MOD = 998244353
MAX = 10000
dp = np.zeros(2 * MAX + 1, dtype=np.int64)
dp[MAX] = 1
for a in A:
    new_dp = np.zeros(2 * MAX + 1, dtype=np.int64)
    new_dp[a:] += dp[:-a]
    new_dp[:-a] += dp[a:]
    dp = new_dp
    dp %= MOD
dp *= np.abs(np.arange(-MAX, MAX + 1))
dp %= MOD
print(dp.sum() % MOD)