n = int(input())
a = list(map(int,input().split()))
mod = 998244353

dp = [[0 for _ in range(2*10**4+2)] for _ in range(n+1)]
dp[0][10**4] = 1
for i in range(n):
    for j in range(2*10**4+2):
        if 0 <= j-a[i] <= 2*10**4+1:
            dp[i+1][j] += dp[i][j-a[i]]
        if 0 <= j+a[i] <= 2*10**4+1:
            dp[i+1][j] += dp[i][j+a[i]]
            
        dp[i+1][j] %= mod
        
ans = 0
st = 10**4
for i in range(2*10**4+2):
    num = (i-st)*dp[n][i]
    # if num != 0:
    #     print(i,num)
    ans += abs((i-st))*dp[n][i]
    ans %= mod
    
print(ans)