#include <atcoder/all>
#include <bits/stdc++.h>
#define rep(i, a, b) for (ll i = (ll)(a); i < (ll)(b); i++)
using namespace atcoder;
using namespace std;

typedef long long ll;
using mint = modint998244353;

template <typename T> ostream &operator<<(ostream &os, const vector<T> &v) {
    int n = v.size();
    rep(i, 0, n) { os << v[i] << " \n"[i == n - 1]; }
    return os;
}

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    ll m;
    string s;
    cin >> m >> s;
    int zerolen = 0;
    rep(i, 0, 1) {
        if (s[i] == '0') {
            s[i] += 10;
        } else {
            break;
        }
    }
    reverse(s.begin(), s.end());
    vector<ll> cnt(11, m / 10), l(11), r(11), md(11);
    rep(i, 0, m % 10) cnt[i]++;
    rep(i, 0, 10) {
        l[i] = i;
        r[i] = i + (cnt[i] - 1) * 10;
        md[i] = (l[i] + r[i]) / 2;
    }
    cnt[10] = cnt[0] - 1;
    l[10] = l[0] + 10;
    r[10] = r[0];
    md[10] = (l[10] + r[10]) / 2;
    mint ans = 0, kind = 1;
    rep(i, 0, s.size()) kind *= cnt[s[i] - '0'];
    mint ten = 1;
    rep(i, 0, s.size()) {
        ans += ten * kind * md[s[i] - '0'];
        ten *= m;
    }
    cout << ans.val() << endl;
}