#include <iostream>
using namespace std;
#include <cstdio>
#include <string.h>
#include <stdlib.h>
#include <math.h>

typedef long long ll;
typedef unsigned long long ull;
typedef long double lb;

ull combi(ull n,ull r)
{
   ull i,j,k;
   ull com=1;
   for(i=0;i<r;i++) com = (com*(n-i)) % 1000000000;

   for(i=0;i<r;i++) com = (com/(r-i)) % 1000000000;
   return com;
}


int main(void)
{
   ull i,j,k;
   int memory[2];
   ull n,m;

   cin >> n >> m;

   n /= 1000;

   printf("%llu\n",combi(m,n%m));

   return 0;
}