//#include <atcoder/all>
#include <bits/stdc++.h>
#include <cmath>
using namespace std;
//using namespace atcoder;
using ll = long long;
#define all(A) A.begin(),A.end()
using vll = vector<ll>;
#define rep(i, n) for (long long i = 0; i < (long long)(n); i++)
using Graph = vector<vector<ll>>;



int main() {
	ll N;
	cin>>N;
	vll A(N);
	rep(i,N)cin>>A[i];
	vector<vll> DP(N+1,vll(40000,0));
	DP[0][20000]=1;
	ll mod=998244353;
	rep(i,N){
		rep(j,40000){
			if(DP[i][j]>0){
				DP[i+1][j+A[i]]+=DP[i][j];
				DP[i+1][j-A[i]]+=DP[i][j];
				DP[i+1][j+A[i]]%=mod;
				DP[i+1][j-A[i]]%=mod;
			}
		}
	}
	ll an=0;
	rep(i,40000){
		ll p=DP[N][i]*abs(i-20000);
		p%=mod;
		
		an+=p;
		an%=mod;
	}
	cout<<an<<endl;
}