#include<bits/stdc++.h>
using namespace std;
#include<atcoder/all>
using namespace atcoder;
using ll = long long;
using mll = modint998244353;

ll n;
vector<string> a;

void solve(){
	sort(a.begin(),a.end(),[](string x,string y){
		return x+y < y+x;
	});
	string ans;
	for(int i = 0;i<n;i++) ans += a[i];
	mll res = 0;
	for(int i = 0;i<ans.size();i++){
		res  = res * 10 + (ans[i]-'0');
	}
	cout<<res.val()<<endl;
}

signed main(){
	cin.tie(nullptr);
	ios::sync_with_stdio(false);
	cin >> n;
	a = vector<string>(n);
	for(ll i = 0; i < n; ++i) cin >> a[i];
	solve();
}