N = int(input())
M = int(input())

total = 1000 * M
k = N // total
R = N - k * total
t = R // 1000

if t == 0:
    print(1)
else:
    mod = 10**9
    res = 1
    for i in range(t):
        res = res * (M - i) // (i + 1)
    print(res % mod)