N = int(input())
M = int(input())
MOD = 10 ** 9
C = [[0 for _ in range(M+1)] for _ in range(M+1)]

for i in range(M+1):
    for j in range(i+1):
        if j in [0, M]:
            C[i][j] = 1
        else:
            C[i][j] = (C[i-1][j-1] + C[i-1][j]) % MOD
            
i = N // (M * 1000)
c = (N - M * 1000 * i) // 1000
ans = C[M][c]
print(ans)