n = int(input())
A = list(map(int, input().split()))

mod = 998244353
dp = [[0 for _ in range(20001)] for _ in range(n + 1)]
dp[0][10000] = 1
for i in range(n):
    for j in range(20001):
        if dp[i][j] != 0:
            dp[i + 1][j - A[i]] += dp[i][j]
            dp[i + 1][j - A[i]] %= mod
            dp[i + 1][j + A[i]] += dp[i][j]
            dp[i + 1][j + A[i]] %= mod

ans = 0
for j in range(20001):
    ans += abs(j - 10000) * dp[n][j]
    ans %= mod
print(ans)