#include<bits/stdc++.h>
using namespace std;
const int mod=998244353;
int main(){
  int N;
  cin>>N;
  vector<int>A(N);
  for(int i=0;i<N;i+=1)cin>>A[i];
  vector<vector<long long>>dp(N+1,vector<long long>(N*203));
  dp[0][N*100]=1;
  for(int i=0;i<N;i+=1){
    for(int j=0;j<N*203;j+=1){
      if(j-A[i]>=0)dp[i+1][j]=(dp[i+1][j]+dp[i][j-A[i]])%mod;
      if(j+A[i]<N*203)dp[i+1][j]=(dp[i+1][j]+dp[i][j+A[i]])%mod;
    }
  }
  long long ans=0;
  for(int i=0;i<203*N;i+=1){
    ans=(ans+abs(i-N*100)*dp[N][i])%mod;
  }
  cout<<ans<<'\n';
}