#include "bits/stdc++.h"
using namespace std;
#define print(x) cout<<x<<endl;
#define rep(i,a,b) for(int i=a;i<b;i++)
#define REP(i,a) for(int i=0;i<a;i++)
#define printall(n,array) for(int i=0;i<n;i++){cout<<array[i];}cout<<endl;
typedef long long ll;
typedef pair<int, int> PI;
typedef pair<int, PI> V;
typedef vector<int> VE;
const ll mod = 1000000000;


void nCr(vector<vector <long long int> > &v){
  for(ll i=0;i<v.size();i++){
    v[i][0]=1;
    v[i][i]=1;
  }  
  for(ll i=1;i<v.size();i++){
    for(ll j=1;j<i;j++){
      v[i][j]=v[i-1][j-1]+v[i-1][j];
    }
  }
}


int main(){
  ll n;
  ll m;
  cin>>n;
  cin>>m;
  vector<vector<long long int> > v(m+1,vector<long long int>(m+1,0));
  ll rest=0;
  rest=(n%(1000*m));
  rest-=rest%1000;
  rest/=1000;
  nCr(v);
  print(v[m][rest]);
}