#include <algorithm>
#include <iostream>
#include <string>
#include <vector>
using namespace std;
using ll = long long;

bool comp(string a, string b) { return a + b < b + a; }

ll mod = 998244353;

int main() {
    ll N;
    cin >> N;
    vector<ll> A(N);
    for (ll i = 0; i < N; i++) {
        cin >> A[i];
    }
    vector<string> As(N);
    for (ll i = 0; i < N; i++) {
        As[i] = to_string(A[i]);
    }
    sort(As.begin(), As.end(), comp);
    vector<ll> pow_10(19);
    pow_10[0] = 1;
    for (ll i = 0; i < 18; i++) {
        pow_10[i + 1] = (pow_10[i] * 10LL) % mod;
    }
    ll ans = 0;
    for (ll i = 0; i < N; i++) {
        ll as_val = stoll(As[i]);
        ll len = As[i].size();
        ans = (ans * pow_10[len]) % mod;
        ans = (ans + as_val % mod) % mod;
    }
    cout << ans << endl;
}