#include <bits/stdc++.h>
using namespace std;
#define int long long
using vec_int = vector<int>;
using vec_ii = vector<vec_int>;
using vec_iii = vector<vec_ii>;
using vec_iiii = vector<vec_iii>;
using P = pair<int,int>;
using T = tuple<int,int,int>;
using ll = long long;
using ld = long double;
#define rep(i, n) for(int i = 0; i < (int)(n); i++)

void cout_line(vector<int> &a){
    for(int i=0;i<a.size();i++){
        if(i<a.size()-1){
            cout<<a.at(i)<<" ";
        }else{
            cout<<a.at(i)<<endl;
        }
    }
}

int charToInt(char c){
    char zero_num = '0';
    return (int)c - (int)zero_num;
}

signed main(){
    int N; cin>>N;
    vec_int A(N); rep(i,N)cin>>A.at(i);

    vector<int> DP(20001, 0);
    DP.at(10000) = 1;
    int MOD = 998244353;

    for(int i=0;i<N;i++){
        int num = A.at(i);
        vec_int DP2(20001, 0);
        for(int i=20000-num;i>=0;i--){
            DP2.at(i+num) += DP.at(i);
            DP2.at(i+num) %= MOD;
        }

        for(int i=num;i<=20000;i++){
            DP2.at(i-num) += DP.at(i);
            DP2.at(i-num) %= MOD;
        }
        DP = DP2;
    }
    int ans = 0;
    for(int i=0;i<=20000;i++){
        int num = abs(10000-i);
        ans += DP.at(i)*num;
        ans %= MOD;

    }
    cout<<ans<<endl;

    return 0;
}