#include <bits/stdc++.h>

using namespace std;
using ll = long long;

int main(){
    cin.tie(nullptr);
    ios_base::sync_with_stdio(false);

    ll N, ans=0;
    cin >> N;
    string S, T="";
    vector<string> v;

    for (int i=0; i<N; i++){
        cin >> S;
        v.push_back(S);
    }

    const ll modc = 998244353;

    auto key=[](string a, string b)->bool{
        return a+b < b+a;
    };
    sort(v.begin(), v.end(), key);

    for (auto &x : v) T += x;
    for (auto x : T){
        ans *= 10;
        ans += x-'0';
        ans %= modc;
    }

    cout << ans << endl;

    return 0;
}