from collections import *
import sys

sys.setrecursionlimit(10 ** 6)
int1 = lambda x: int(x) - 1
p2D = lambda x: print(*x, sep="\n")
def II(): return int(sys.stdin.readline())
def MI(): return map(int, sys.stdin.readline().split())
def MF(): return map(float, sys.stdin.readline().split())
def LI(): return list(map(int, sys.stdin.readline().split()))
def LF(): return list(map(float, sys.stdin.readline().split()))
def LLI(rows_number): return [LI() for _ in range(rows_number)]

md = 10 ** 9

def com(com_n, com_r):
    if com_n < com_r * 2: com_r = com_n - com_r
    if com_r==1:return com_n
    if com_r==0:return 1
    return (com(com_n - 1, com_r) + com(com_n - 1, com_r - 1)) % md

def main():
    n = II()
    m = II()
    n //= 1000
    hit = n % m
    print(com(m, hit))

main()