#include <bits/stdc++.h>
using namespace std;
using ll = long long;
#ifdef LOCAL
#include "algo/debug.h"
#else
#define debug(...) (void(0))
#endif
void run_case();
int main() {
    std::ios_base::sync_with_stdio(false);
    std::cin.tie(nullptr);
    int T = 1;
    // cin >> T;
    while (T--) run_case();
    return 0;
}
void run_case() {
    int N;
    cin >> N;
    vector<string> A(N);
    for(int i = 0; i < N; i++) cin >> A[i];
    sort(A.begin(), A.end());
    const int md = 998244353;
    ll ans = 0;
    for(int i = 0; i < N; i++)
    {
        for(int j = 0; j < A[i].size(); j++) {
            ans *= 10;
            ans += A[i][j] - '0';
            ans %= md;
        }
    }
    cout << ans << endl;
}