#include <iostream>
#include <vector>
#include <algorithm>

using namespace std;
using ll = long long;

int main () {
    int N; cin >> N;
    vector<ll> A(N);
    for (int i = 0; i < N; i++) cin >> A[i];

    const ll MOD = 998244353;
    // 昇順にやればよい
    sort(A.begin(), A.end());

    ll x = 0;
    for (auto& a : A) {
        x *= 10;
        x %= MOD;
        x += a % MOD;
        x %= MOD;
    }

    cout << x << "\n";
}