#include<iostream>
#include<set>
#include<algorithm>
#include<vector>
#include<string>
#include<set>
#include<map>
#include<numeric>
#include<queue>
#include<cmath>
using namespace std;
typedef long long ll;
const ll INF=1LL<<60;
typedef pair<int,int> P;
typedef pair<int,P> PP;
const ll MOD=998244353;
const double PI=acos(-1);




//xのy乗
ll mod_pow(ll x,ll y,ll mod){
    ll power=x;
    ll ret = 1;
    while(y>0){
        if(y&1){
           ret = ret*power%mod;
        }
        power = power*power%mod;
        y = y>>1;
    }
    return ret;

}



struct combination{
    typedef long long ll;
    std::vector<ll> fact,ifact;
    combination(ll n): fact(n+1),ifact(n+1){
        fact[0]=1;//0!=1通り
        for(ll i=1;i<=n;i++) fact[i] = fact[i-1]*i%MOD;
        //ifact[n] = fact[n].inv();
        
        // n!の逆元がifact[n]
        ifact[n] = mod_pow(fact[n],MOD-2,MOD);// n!を(mod-2)乗した後でmodであまりをとった
        for(ll i=n;i>=1;i--) ifact[i-1] = ifact[i]*i%MOD;
    }

    ll operator()(ll n,ll k){
        if(k<0 || k>n) return 0;
        // n!/( k!*(n-k)! )
        return (fact[n]*ifact[k])%MOD * ifact[n-k]%MOD;
    }

};

combination comb(10*100000);

int main(){
    ll N,P;
    cin>>N>>P;


    ll res=0;
    for(int k=0;k*P<=N;k++){

        ll tmp=comb.fact[N];

        ll d=comb.fact[k];
        d*=comb.fact[N-k*P];
        d%=MOD;
        d*=mod_pow(P,k,MOD);
        d%=MOD;

        tmp*=mod_pow(d,MOD-2,MOD);
        tmp%=MOD;

        res+=tmp;
        res%=MOD;
    }

    ll ans=comb.fact[N];
    ans-=res;
    ans+=MOD;
    ans%=MOD;

    cout<<ans<<endl;


}