#include <iostream>
#include <utility>
#include <vector>
#include <string>
#include <cstdio>


using namespace std;

int main(){

    long long int n,l;
    long long int s=998244353; 
    cin>>n>>l;

    

    if (n%l!=0)
        cout<<(n/l*2+1)%s<<endl;
    else
        cout<<(n/l*2-1)%s<<endl;
    
}