N = int(input())
M = int(input())
a = N//1000//M
b = N - (a * M) * 1000
c = b//1000

def perm(n, k):
    result = 1
    for i in range(1, k + 1):
        result *= (n - i + 1)
        result //= i
    return result

print(perm(M, c)%1000000000)