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#include <fstream>
using namespace std;
ifstream fin ("sandokan.in");
ofstream fout ("sandokan.out");
int pas[2][5050],i,k,n,ln,j;
void pascal(){
pas[0][0]=1;
//semn=1;
for(i=1;i<n;i++){
//ln=1;
ln=i%2;
pas[ln][0]=1;
for(j=1;j<=i;j++){
pas[ln][j]=pas[!ln][j]+pas[!ln][j-1];
pas[ln][j]%=2000003;
}
}
}
int main(){
fin>>n>>k;
k=(n-1)%(k-1);
pascal();
fout<<pas[(n-1)%2][k];
return 0;
}