#include<stdio.h>
#define MOD 2000003

int n,k,p,c[2][5003];

int main ()
{
    int i,j;
    freopen("sandokan.in","r",stdin);
    freopen("sandokan.out","w",stdout);
    scanf("%d%d",&n,&k);
    p=n;
    c[0][0]=1;c[1][0]=1;
    while(p>=n)
    {
        p-=k;
        p++;
    }
    for(i=1;i<n;i++)
        for(j=1;j<p;j++)
            c[i&1][j]=(c[(i+1)&1][j]+c[(i+1)&1][j-1])%MOD;
    printf("%d",c[(n-1)&1][p-1]);
    return 0;
}