#include<bits/stdc++.h>
#include<atcoder/convolution>
using namespace std;
using ll = long long;

const ll MOD = 998244353;

int main() {
    ios::sync_with_stdio(false);
    cin.tie(nullptr);
    int n, m;
    if (!(cin >> n >> m)) return 0;

    vector<ll> f = {1, 1};
    for (int iter = 0; iter < n; ++iter) {
        vector<ll> fy = f;
        fy[0] = 0;
        f = atcoder::convolution(f, fy);
        f[0] = 1;
    }

    ll ans = f[(1<<n) - m] % MOD;
    for (int i = 1; i <= m; ++i) ans = ans * i % MOD;
    for (int i = 1; i <= (1<<n) - m; ++i) ans = ans * i % MOD;

    cout << ans % MOD << endl;
    return 0;
}