#include <bits/stdc++.h>
#define rep(i,n) for(int i = 0; i < (int)(n); i++)

using namespace std;
using LL = long long;
using P = pair<int,int>;
using vv = vector<vector<int>>;
const int INF = (int)1e9;
const LL LINF = (LL)1e18;

long long const mod = 998244353;
struct mint{
	long long val;
	mint(long long val = 0): val(val % mod) {}
	mint& operator += (const mint n){
		val += n.val;
		if(val >= mod) val -= mod;
		return *this;
	}
	mint& operator -= (const mint n){
		val -= n.val;
		if(val < 0) val += mod;
		return *this;
	}
	mint& operator *= (const mint n){
		val *= n.val;
		val %= mod;
		if(val < 0) val += mod;
		return *this;
	}
	mint operator + (const mint n) const{
		mint res(*this);
		return res += n;
	}
	mint operator - (const mint n) const{
		mint res(*this);
		return res -= n;
	}
	mint operator * (const mint n) const{
		mint res(*this);
		return res *= n;
	}
	mint pow(long long n) const{
		if(n == 0) return 1;
		mint m = pow(n >> 1);
		m *= m;
		if(n & 1) m *= *this;
		return m;
	}
	// mint division for prime mod
	mint inv() const{
		return pow(mod - 2);
	}
	mint& operator /= (const mint n){
		return (*this) *= n.inv();
	}
	mint operator / (const mint n) const{
		mint res(*this);
		return res /= n;
	}
};

mint dp[110][40010];

int main(){
	int N;
	cin >> N;
	vector<int> A(N);
	rep(i,N) cin >> A[i];
	dp[0][20000] = 1;
	rep(i,N){
		for(int j = 10000; j <= 30000; j++){
			dp[i+1][j+A[i]] += dp[i][j];
			dp[i+1][j-A[i]] += dp[i][j];
		}
	}
	mint ans = 0;
	rep(j,40005){
		mint tot = abs(j - 20000);
		ans += tot * dp[N][j];
	}
	cout << ans.val << endl;

	return 0;
}