n = int(input())
a = list(map(int,input().split()))

d = [[0 for i in range(2*100*100+1)] for j in range(n+1)]
d[0][100*100] = 1

for i, x in enumerate(a):
    for j in range(2*100*100+1):
        if 0 <= j+x <= 2*100*100:
            d[i+1][j+x] += d[i][j]
        if 0 <= j-x <= 2*100*100:
            d[i+1][j-x] += d[i][j]

ans = 0
mod = 998244353

for i in range(2*100*100+1):
    ans += abs((i-100*100)*d[-1][i])
    ans %= mod
print(ans)
#print(d[-1][100*100-20:100*100+20])