#include <bits/stdc++.h>
using namespace std;
const long long MOD = 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>(20001, 0));
  dp[0][10000] = 1;
  for (int i = 0; i < N; i++){
    for (int j = A[i]; j <= 20000 - A[i]; j++){
      dp[i + 1][j - A[i]] += dp[i][j];
      dp[i + 1][j - A[i]] %= MOD;
      dp[i + 1][j + A[i]] += dp[i][j];
      dp[i + 1][j + A[i]] %= MOD;
    }
  }
  long long ans = 0;
  for (int i = 0; i <= 20000; i++){
    ans += dp[N][i] * abs(i - 10000);
    ans %= MOD;
  }
  cout << ans << endl;
}