/* -*- coding: utf-8 -*-
 *
 * 2734.cc:  No.2734 Addition and Multiplication in yukicoder (Hard) - yukicoder
 */

#include<cstdio>
#include<string>
#include<algorithm>
 
using namespace std;

/* constant */

const int MAX_N = 200000;
const int MAX_L = 20;
const int MOD = 998244353;

/* typedef */

typedef long long ll;

/* global variables */

string as[MAX_N];

/* subroutines */

bool cmpstr(const string &a, const string &b) {
  return (a + b) < (b + a);
}

/* main */

int main() {
  int n;
  scanf("%d", &n);
  for (int i = 0; i < n; i++) {
    char s[MAX_L + 4];
    scanf("%s", s);
    as[i] = string(s);
  }

  sort(as, as + n, cmpstr);

  int sum = 0;
  for (int i = 0; i < n; i++)
    for (auto c: as[i])
      sum = ((ll)sum * 10 + (c - '0')) % MOD;

  printf("%d\n", sum);
  
  return 0;
}