const MOD: usize = 998244353;

fn main() {
    let mut n = String::new();
    std::io::stdin().read_line(&mut n).ok();
    let n: usize = n.trim().parse().unwrap();
    let mut a = String::new();
    std::io::stdin().read_line(&mut a).ok();
    let a: Vec<usize> = a.trim().split_whitespace().map(|s| s.parse().unwrap()).collect();

    let summary = a.iter().sum::<usize>();
    let mut dp = vec![vec![0usize; 2*summary+1]; n+1];
    dp[0][summary] = 1;
    for i in 0..n {
        for j in 0..=2*summary {
            if dp[i][j] == 0 { continue; }
            dp[i+1][j-a[i]] += dp[i][j];
            dp[i+1][j+a[i]] += dp[i][j];
            dp[i+1][j-a[i]] %= MOD;
            dp[i+1][j+a[i]] %= MOD;
        }
    }
    let mut result = 0usize;
    for i in 0..=summary {
        result += i * dp[n][summary-i];
        result += i * dp[n][summary+i];
        result %= MOD;
    }
    println!("{}", result);
}