#include<bits/stdc++.h>
#include<atcoder/all>
using namespace std;
using namespace atcoder;
#define rep(i,n)for (int i = 0; i < int(n); ++i)
#define rrep(i,n)for (int i = int(n)-1; i >= 0; --i)
#define all(x) (x).begin(), (x).end()
#define rall(x) (x).rbegin(), (x).rend()
template<class T> void chmax(T& a, const T& b) {a = max(a, b);}
template<class T> void chmin(T& a, const T& b) {a = min(a, b);}
using ll = long long;
using P = pair<int,int>;
using VI = vector<int>;
using VVI = vector<VI>;
using VL = vector<ll>;
using VVL = vector<VL>;
using mint = modint998244353;

mint dp[20001];
mint ndp[20001];
constexpr int B = 10000;
int main() {
    ios::sync_with_stdio(false);
    cin.tie(0);
    dp[B] = 1;
    int n;
    cin >> n;
    rep(_, n) {
        int x;
        cin >> x;
        x = abs(x);
        rep(i, 20001) ndp[i] = 0;
        for(int i = x; i <= 20000 - x; i++) ndp[i + x] += dp[i], ndp[i - x] += dp[i];
        rep(i, 20001) dp[i] = ndp[i];
    }
    mint ans;
    rep(i, 20001) {
        int x = abs(B - i);
        ans += x * dp[i];
    }
    cout << ans.val() << endl;
}