pub mod io {
    use std::io::{BufRead, ErrorKind};

    pub fn scan<R: BufRead>(r: &mut R) -> Vec<u8> {
        let mut res = Vec::new();
        loop {
            let buf = match r.fill_buf() {
                Ok(buf) => buf,
                Err(e) if e.kind() == ErrorKind::Interrupted => continue,
                Err(e) => panic!("{}", e), 
            };
            let (done, used, buf) = {
                match buf.iter().position(u8::is_ascii_whitespace) {
                    Some(i) => (i > 0 || res.len() > 0, i + 1, &buf[..i]),
                    None => (buf.is_empty(), buf.len(), buf),
                }
            };
            res.extend_from_slice(buf);
            r.consume(used);
            if done { return res; }
        }
    }

    #[macro_export]
    macro_rules! scan {
        ($r:expr, [$t:tt; $n:expr]) => {
            (0..$n).map(|_| scan!($r, $t)).collect::<Vec<_>>()
        };
        ($r:expr, [$t:tt]) => {
            scan!($r, [$t; scan!($r, usize)])
        };
        ($r:expr, ($($t:tt),*)) => {
            ($(scan!($r, $t)),*)
        };
        ($r:expr, Usize1) => {
            scan!($r, usize) - 1
        };
        ($r:expr, Bytes) => {
            io::scan($r)
        };
        ($r:expr, String) => {
            String::from_utf8(scan!($r, Bytes)).unwrap()
        };
        ($r:expr, $t:ty) => {
            scan!($r, String).parse::<$t>().unwrap()
        };
    }

    #[macro_export]
    macro_rules! input {
        ($($($v:ident)* : $t:tt),* $(,)?) => {
            let stdin = std::io::stdin();
            let ref mut reader = std::io::BufReader::new(stdin.lock());
            $(let $($v)* = scan!(reader, $t);)*
        };
    }
}

const MOD: u64 = 998_244_353;
const MAX: usize = 10_000;

fn main() {
    input! {
        n: usize,
        a: [usize; n],
    }

    let mut dp = vec![0; MAX + 1];
    dp[0] = 1;
    for a in a {
        let mut ndp = vec![0; MAX + 1];
        for (i, dp) in dp.iter().enumerate() {
            if *dp == 0 {
                continue;
            }
            let ni = a + i;
            ndp[ni] += dp;
            ndp[ni] %= MOD;
            let ni = if a < i { i - a } else { a - i };
            ndp[ni] += dp;
            ndp[ni] %= MOD;
        }
        dp = ndp;
    }

    let ans = {
        dp.iter()
            .enumerate()
            .fold(0, |acc, (i, dp)| (acc + (i as u64 * dp) % MOD) % MOD)
    };
    println!("{}", ans);
}