using System;
using static System.Console;
using System.Linq;
using System.Collections.Generic;

class Program
{
    static int NN => int.Parse(ReadLine());
    static int[] NList => ReadLine().Split().Select(int.Parse).ToArray();
    public static void Main()
    {
        Solve();
    }
    static void Solve()
    {
        var n = NN;
        var a = NList;
        var mod = 998_244_353;
        var dp = new long[20001];
        dp[10000] = 1;
        for (var i = 0; i < n; ++i)
        {
            var ndp = new long[20001];
            for (var j = 0; j < dp.Length; ++j)
            {
                if (j - a[i] >= 0) ndp[j - a[i]] = (ndp[j - a[i]] + dp[j]) % mod;
                if (j + a[i] < ndp.Length) ndp[j + a[i]] = (ndp[j + a[i]] + dp[j]) % mod;
            }
            dp = ndp;
        }
        var ans = 0L;
        for (var i = 0; i < dp.Length; ++i) ans = (ans + Math.Abs(i - 10000) * dp[i] % mod) % mod;
        WriteLine(ans);
    }
}