## https://yukicoder.me/problems/no/1645

MOD = 998244353

def main():
    N = int(input())
    A = list(map(int, input().split()))

    max_a = sum([abs(a) for a in A])

    dp = {0:1}
    for a in A:
        new_dp = {}
        for key, value in dp.items():
            if (key + a) not in new_dp:
                new_dp[key + a] = 0
            new_dp[key + a] += value
            new_dp[key + a] %= MOD

            if (key - a) not in new_dp:
                new_dp[key - a] = 0
            new_dp[key - a] += value
            new_dp[key - a] %= MOD
        dp = new_dp

    answer = 0    
    for key, value in dp.items():
        k = abs(key)
        answer += (k * value) % MOD
        answer %= MOD

    print(answer)


if __name__ == "__main__":
    main()