package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"strconv"
)

func out(x ...interface{}) {
	fmt.Println(x...)
}

var sc = bufio.NewScanner(os.Stdin)

func getInt() int {
	sc.Scan()
	i, e := strconv.Atoi(sc.Text())
	if e != nil {
		panic(e)
	}
	return i
}

func getInts(N int) []int {
	ret := make([]int, N)
	for i := 0; i < N; i++ {
		ret[i] = getInt()
	}
	return ret
}

func getString() string {
	sc.Scan()
	return sc.Text()
}

// min, max, asub, absなど基本関数
func max(a, b int) int {
	if a > b {
		return a
	}
	return b
}

func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}

func asub(a, b int) int {
	if a > b {
		return a - b
	}
	return b - a
}

func abs(a int) int {
	if a >= 0 {
		return a
	}
	return -a
}

func lowerBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] >= x
	})
	return idx
}

func upperBound(a []int, x int) int {
	idx := sort.Search(len(a), func(i int) bool {
		return a[i] > x
	})
	return idx
}

const mod = int(1e9)

func nCk(n, k int) int {
	if k == 0 {
		return 1
	}
	x := 1
	y := 1
	for i := 1; i <= k; i++ {
		// out(n-i+1, i)
		x *= (n - i + 1)
		x %= mod
		y *= i
		y %= mod
	}
	return x / y
}

var C [10001][10001]int32 // C[n][k] -> nCk

func combTable(N int) {
	C[0][0] = 1
	for i := 1; i <= N; i++ {
		for j := 0; j <= N; j++ {
			if j == 0 || j == i {
				C[i][j] = 1
			} else {
				C[i][j] = (C[i-1][j-1] + C[i-1][j]) % int32(mod)
			}
		}
	}
}

func main() {
	sc.Split(bufio.ScanWords)
	N, M := getInt(), getInt()
	N /= 1000
	// x := N / M
	y := N % M
	combTable(10000)
	out(C[M][y])
}