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

def pascal(n, k):
    z = n+1
    p = [[0 for _ in range(z)] for _ in range(z)]
    p[0][0] = 1
    for x in range(1, z):
        for y in range(0, z):
            p[x][y] = (p[x-1][y-1] + p[x-1][y])%1000000000
    return p[n][k]

print(pascal(M, c)%1000000000)