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

int main(){
    ios::sync_with_stdio(false);
    cin.tie(0);
    int n;
    cin >> n;
    vector<char> a(n);
    for(auto &&v : a) cin >> v;
    sort(a.begin(), a.end());
    mint ans;
    if(n % 2 == 0){
        array<int, 10> cnt{};
        for(auto &&c : a) cnt[c - '0']++;
        string b;
        for(int i = 0; i < 10; i++){
            if(cnt[i] & 1){
                b += i + '0';
                cnt[i]--;
            }
        }
        if(b.empty()){
            cout << "0\n";
            return 0;
        }
        for(int i = 0; i < 10; i++){
            if(cnt[i] >= 1){
                b += i + '0';
                cnt[i]--;
                break;
            }
        }
        for(int i = 9; i >= 0; i--){
            if(cnt[i] >= 1){
                b += i + '0';
                cnt[i]--;
                break;
            }
        }
        int m = b.size();
        auto dfs = [&](auto dfs, int S, ll v) -> ll {
            if(__builtin_popcount(S) == m) return abs(v);
            ll mn = 1ll << 60;
            for(int i = 0; i < m; i++){
                if(S >> i & 1) continue;
                for(int j = 0; j < m; j++){
                    if(S >> j & 1) continue;
                    if(i == j) continue;
                    mn = min(mn, dfs(dfs, S | (1 << i) | (1 << j), 
                                    v * 10 + ((int)(b[i] - '0') - (int)(b[j] - '0'))));
                    mn = min(mn, dfs(dfs, S | (1 << i) | (1 << j), 
                                    v * 10 + ((int)(b[j] - '0') - (int)(b[i] - '0'))));
                }
            }
            return mn;
        };
        ans = dfs(dfs, 0, 0);
    }else{
        mint v0, v1;
        for(int i = 0; i < (n + 1) / 2; i++){
            v0 *= 10;
            v0 += a[i] - '0';
        }
        for(int i = 0; i < n / 2; i++){
            v1 *= 10;
            v1 += a.rbegin()[i] - '0';
        }
        ans = v0 - v1;
    }
    cout << ans.val() << '\n';
}