#include <bits/stdc++.h>

#include <atcoder/modint>
using namespace std;
using mint = atcoder::modint998244353;
void fast_io() {
    ios_base::sync_with_stdio(false);
    cin.tie(nullptr);
}
int main() {
    fast_io();
    int n;
    cin >> n;
    vector<string> a(n);
    for (int i = 0; i < n; i++) {
        cin >> a[i];
    }
    sort(a.begin(), a.end());
    string s = "";
    for (string t : a) {
        s += t;
    }
    mint ans = 0;
    for (char c : s) {
        ans = 10 * ans + (c - '0');
    }
    cout << ans.val() << endl;
}