#include <bits/stdc++.h>
using namespace std;

constexpr int mod = 998244353;
long long dp[105][30005];

int main() {
    int N;
    cin >> N;
    vector<int>A(N);
    dp[0][15000] = 1;
    for(int i = 0; i < N; i++) {
        cin >> A[i];
        for(int j = 0; j <= 30000; j++) {
            if(dp[i][j] == 0) {
                continue;
            }
            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 <= 30000; i++) {
        ans += dp[N][i]*abs(i-15000)%mod;
        ans %= mod;
    }
    cout << ans << endl;
}