n = int(input())
m = int(input())
MOD = 10**9
dp = [0]*(m+1)
dp[0] = 1
for _ in range(m):
    ndp = dp[:]
    for j in range(m+1):
        ndp[j] += dp[j-1]
        ndp[j] %= MOD
    dp = ndp
print(dp[n//1000%m])