'''
    Python3(PyPy3) Template for Programming-Contest.

    author : sgsw

    generated : 2021/08/13   
    when : 21:56:07

'''

import sys


def input():
    return sys.stdin.readline().rstrip()


DXY = [(0, -1), (1, 0), (0, 1), (-1, 0)]  # LDRU
mod = 998244353
inf = 1 << 64


def main():
    n = int(input())
    a = list(map(int,input().split()))
    base = 12000
    dp = [[0]*(2 * base) for i in range(n + 1)]
    dp[0][0 + base] = 1
    for i in range(n):
        for val in range(-base,base):
            pre = dp[i][val + base]
            try:
                dp[i + 1][val - a[i]+ base] += pre
                dp[i + 1][val - a[i] + base] % mod 
            except:
                pass
            try:
                dp[i + 1][val + a[i] + base] += pre 
                dp[i + 1][val + a[i] + base] %= mod 
            except:
                pass
    ans = 0
    for i in range(-base,base):
        ans += abs(i) * dp[n][i + base]
        ans %= mod 
    print(ans)
    return 0


if __name__ == "__main__":
    main()