#include <bits/stdc++.h>
using namespace std;
const long long MOD = 998244353;

// cntの前or後ろからdigit桁取った数
long long make_num(const vector<int> &cnt, int digit, bool reversed = false, long long st = 0) {
  long long res = st;
  if (!reversed) {
    for (int i = 1; i <= 9 && digit > 0; i++) {
      for (int j = 0; j < cnt[i] && digit > 0; j++) {
        res = res*10+i;
        digit--, res%=MOD;
      }
    }
  }
  else {
    for (int i = 9; i >= 1 && digit > 0; i--) {
      for (int j = 0; j < cnt[i] && digit > 0; j++) {
        res = res*10+i;
        digit--, res%=MOD;
      }
    }
  }
  return res;
}

int main() {
  int N;
  cin >> N;
  vector<int> c(N), cnt(10);
  for (int i = 0; i < N; i++) cin >> c[i], cnt[c[i]]++;

  if (N%2 == 1) {  // N = 2k+1
    long long x = make_num(cnt, (N+1)/2), y = make_num(cnt, N/2, true);
    cout << (x-y+MOD)%MOD << endl;
  }
  else {  // N = 2k
    long long ans = (1LL<<60);  // inf
    vector<int> cnt_subset(10);
    int sum = 0;
    for (int i = 1; i <= 9; i++) cnt_subset[i] = cnt[i]%2, sum += cnt[i]%2;

    if (sum == 0) ans = 0;

    // 2数の10^lの位の数字が等しいとき
    for (int i = 1; i <= 9; i++) {
      for (int j = i+1; j <= 9; j++) {
        if (cnt_subset[i] == 0 || cnt_subset[j] == 0) continue;
        cnt_subset[i]--, cnt_subset[j]--;  // i<j
        long long x = make_num(cnt_subset, sum/2-1, true, i), y = make_num(cnt_subset, sum/2-1, false, j);
        ans = min(ans, abs(x-y));
        cnt_subset[i]++, cnt_subset[j]++;
      }
    }

    // 2数の10^lの位の数字が異なるとき
    sum += 2;
    for (int i = 1; i <= 9; i++) {  // 加える数字
      if (cnt[i] < cnt_subset[i]+2) continue;
      cnt_subset[i] += 2;
      for (int j = 1; j+1 <= 9; j++) {  // 10^lの位
        if (cnt_subset[j] == 0 || cnt_subset[j+1] == 0) continue;
        cnt_subset[j]--, cnt_subset[j+1]--;  // j<j+1
        long long x = make_num(cnt_subset, sum/2-1, true, j), y = make_num(cnt_subset, sum/2-1, false, j+1);
        ans = min(ans, abs(x-y));
        cnt_subset[j]++, cnt_subset[j+1]++;
      }
      cnt_subset[i] -= 2;
    }

    cout << ans%MOD << endl;
  }
}