#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;}


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

	vector<int> B;
	B.push_back(A[0]);
	B.push_back(-1*A[0]);
	for(int i = 1; i < N; ++i){
		vector<int> C;
		for(auto v : B){
			C.push_back(v + A[i]);
			C.push_back(v - A[i]);
		}
		B.assign(C.begin(), C.end());
	}
	long long ans = 0;

	for(auto v : B){
	   ans += abs(v);
   	   ans %= 998244353;
	}
	cout << ans << endl;	
	
}