n=int(input())
m=int(input())
l=(n//1000)//m
k=n//1000-l*m
M=10**9
c=[[0]*(m+1) for i in range(m+1)]
c[0][0]=1
for i in range(m):
  for j in range(m):
    c[i+1][j]+=c[i][j]
    c[i+1][j]%=M
    c[i+1][j+1]+=c[i][j]
    c[i+1][j+1]%=M
print(c[m][k])