#include <stdio.h>

long long int sum,n,m,r;

int gcd( int a, int b){
	if(b == 0){
		return a;
	}
	
	if(a > b){
		return gcd(b,a%b);
	}else{
		return gcd(a,b%a);
	}
}
int C(int n, int r){
	int i, j, tr;
	int tmp[10010]={0};
	sum = 1;
	
	if( n < r ){return 0;}
	
	for(i=0;i<10010;i++){
		tmp[i] = 1;
	}
	
	for(i=n;i>1;i--){
		if( r == i ){break;}
		if( (n-r) == i ){break;}
		tmp[i] = i;
	}
	tr = n-i;
	
	for(i=2;i<=tr;i++){
		int ti=i;
		for(j=2;j<=n;j++){
			int g = gcd(tmp[j], ti);
			if( g != 1){
				tmp[j] /= g;
				ti /= g;
			}
			if(ti == 1){
				break;
			}
		}
	}
	
	
	for(i=1;i<=n;i++){
		if(tmp[i] != 0){
			sum = (sum*tmp[i])% 1000000000;
		}
	}
	return (int)(sum);
}

int main(void){
	
	scanf("%lld", &n);
	scanf("%lld", &m);
	
	r = (n / 1000) % m;
	
	printf("%d\n", C((int)m,(int)r));

	return 0;
}