using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Numerics;

namespace yukicoder
{
    class Program
    {
        const int intMax = 1000000000;
        const long longMax = 2000000000000000000;
        static void Main(string[] args)
        {
            int N = int.Parse(Console.ReadLine());
            var A = Console.ReadLine().Split().Select(int.Parse).ToArray();
            var dp = new Dictionary<int, long>();
            long mod = 998244353;
            dp[0] = 1;
            for(int i = 0; i < N; i++)
            {
                var temp = new Dictionary<int, long>();
                foreach(var d in dp)
                {
                    if(!temp.ContainsKey(d.Key + A[i]))
                    {
                        temp.Add(d.Key + A[i],0);
                    }
                    if(!temp.ContainsKey(d.Key - A[i]))
                    {
                        temp.Add(d.Key - A[i],0);
                    }                    
                    temp[d.Key + A[i]] = (temp[d.Key + A[i]] + d.Value) % mod;
                    temp[d.Key - A[i]] = (temp[d.Key - A[i]] + d.Value) % mod;             
                }
                dp = temp;
            }
            long ans = 0;
            foreach(var d in dp)
            {
                ans = (ans + (Math.Abs(d.Key) * d.Value) % mod ) % mod;
            }
            Console.WriteLine(ans);
        }
    }
}