import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.*;

public class Main {
	static List<List<String>> list;
	static int[] idx, size;

	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		list = new ArrayList<>(20);
		for (int i = 0; i < 20; i++) {
			list.add(new ArrayList<>());
		}
		for (int i = 0; i < n; i++) {
			list.get(sa[i].length()).add(sa[i]);
		}
		br.close();

		size = new int[20];
		for (int i = 0; i < 20; i++) {
			size[i] = list.get(i).size();
			Collections.sort(list.get(i));
		}

		int mod = 998244353;
		StringBuilder sb = new StringBuilder();
		idx = new int[20];
		for (int i = 0; i < n - 1; i++) {
			for (int j = 19; j > 0; j--) {
				if (idx[j] < size[j]) {
					min = list.get(j).get(idx[j]);
					mini = j;
					break;
				}
			}
			for (int j = mini - 1; j > 0; j--) {
				if (idx[j] < size[j]) {
					String s = list.get(j).get(idx[j]);
					if (s.compareTo(min.substring(0, j)) < 0) {
						min = s;
						mini = j;
					}
				}
			}
			for (int j = mini - 1; j > 0; j--) {
				if (idx[j] < size[j]) {
					StringBuilder sb2 = new StringBuilder();
					sb2.append(list.get(j).get(idx[j]));
					idx[j]++;
					dfs(sb2, j);
					idx[j]--;
				}
			}
			sb.append(list.get(mini).get(idx[mini]));
			idx[mini]++;
		}
		for (int j = 1; j < 20; j++) {
			if (idx[j] < size[j]) {
				sb.append(list.get(j).get(idx[j]));
				break;
			}
		}

		long ans = 0;
		for (int i = 0; i < sb.length(); i++) {
			int d = sb.charAt(i) - '0';
			ans *= 10;
			ans += d;
			ans %= mod;
		}
		System.out.println(ans);
	}

	static String min;
	static int mini;
	static void dfs(StringBuilder sb, int f) {
		String s = sb.toString();
		if (sb.length() >= min.length()) {
			if (s.compareTo(min) < 0) {
				min = s;
				mini = f;
			}
			return;
		} else {
			if (s.compareTo(min.substring(0, s.length())) < 0) {
				min = s;
				mini = f;
				return;
			}
		}
		for (int i = 19; i > 0; i--) {
			if (idx[i] < size[i]) {
				sb.append(list.get(i).get(idx[i]));
				idx[i]++;
				if (sb.toString().compareTo(min) < 0) {
					dfs(sb, f);
				}
				idx[i]--;
				sb.delete(sb.length() - i, sb.length());
			}
		}
	}
}