def main():
    N = int(input())
    A = list(map(int, input().split()))
    MOD = 998244353

    dp_table = [[0 for _ in range(20002)] for _ in range(N + 1)]
    dp_table[0][10000] = 1
    for idx, value in enumerate(A):
        for cur_sum_idx in range(20002):
            cur_sum = cur_sum_idx - 10000
            if abs(cur_sum - value) <= 10000:
                dp_table[idx + 1][cur_sum_idx -
                                  value] += dp_table[idx][cur_sum_idx]
            if abs(cur_sum + value) <= 10000:
                dp_table[idx + 1][cur_sum_idx +
                                  value] += dp_table[idx][cur_sum_idx]
    total_sum = 0
    for sum_value, ctr_n in enumerate(dp_table[-1], -10000):
        total_sum += (abs(sum_value) * ctr_n) % MOD
        total_sum %= MOD
    print(total_sum)


if __name__ == "__main__":
    main()