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#include <fstream>
#include <cstring>
using namespace std;
ifstream fin("sandokan.in");
ofstream fout("sandokan.out");
int n,k;
const int modulo = 2000003;
int c[10000];
int a[10000];
int main()
{
fin>>n>>k;
c[0]=1;
a[0]=1;
a[1]=1;
for(int i=2;i<=n-1;i++)
{
for(int j=1;j<=i;j++)
{
c[j]= a[j]+a[j-1];
if(c[j]>modulo)
c[j]%=modulo;
}
memcpy(a,c,sizeof(c));
}
fout<<c[(n-1)%(k-1)];
}