n = int(input())
a = list(map(int, input().split()))
MOD = 998244353

dp = [[0 for i in range(- 10000, 10001)] for j in range(n + 1)]
dp[0][10000] = 1

for j in range(n):
    for i in range(- 10000, 10001):
        if -10000 <= i + a[j] <= 10000:
            dp[j + 1][i + a[j] + 10000] += dp[j][i + 10000]
            dp[j + 1][i + a[j] + 10000] %= MOD
        if -10000 <= i - a[j] <= 10000:
            dp[j + 1][i - a[j] + 10000] += dp[j][i + 10000]
            dp[j + 1][i - a[j] + 10000] %= MOD

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

print(ans)