#include<bits/stdc++.h>
#include<iostream>
using namespace std;
using LL = long long;
using P = pair<int,int>;
using Graph = vector<vector<int>>;
const int INF = 1 << 29;
const long long LINF = 1LL << 60;
#define all(x) (x).begin(), (x).end()
#define rep(i,n) for(int i = 0; i < (n); ++i)
template<class T>void chmin(T&a, T b){if(a > b) a = b;}
template<class T>void chmax(T&a, T b){if(a < b) a = b;}

const long long M = 998244353;

int main(){
	int N; cin >> N;
	vector<int> A(N); 
	for(int i = 0; i < N; ++i) cin >> A[i];

	vector<vector<long long>> dp(N+1, vector<long long>(40000, 0));
	dp[0][20000] = 1;

	for(int i = 0; i < N; ++i){
		for(int j = 0; j < 40000; ++j){
			if(dp[i][j]>0){
				dp[i+1][j+A[i]] += dp[i][j]%M;
				dp[i+1][j-A[i]] += dp[i][j]%M;
			}
		}
	}

	long long ans = 0;
	for(int i = 0; i < 40000; ++i){
		if(dp[N][i]){
			ans += dp[N][i]*abs(i - 20000)%M;
			ans %= M;
		}
	}
	cout << ans << endl;
}