#include <bits/stdc++.h>
using namespace std;
#define rep(i,n) for (int i = 0; i < (n); i++) 
#define all(v) begin(v),end(v)
using ll = long long;

int main() {
  ll n,l;cin>>n>>l;
  int mod=998244353;
  ll ans=((ll)n+l-1)/l;
  cout<<(ans*2)%mod-1<<endl;
}