import math
N = int(input())
M = int(input())

def ncr(n, r):
    f = math.factorial
    return f(n) // f(r) // f(n - r)

def floor(src, p=1000):
    return int(src / p) * p

a, b = divmod(N, 1000*M)

if b == 0:
    print(1)
else:
    surplus = floor(b)
    if surplus < 1000:
        print(1)
    else:
        ans = ncr(M, surplus//1000)
        print(ans%1000000000)