N = int(input()) - 4
mod = 10 ** 9 + 7
ans = [0] * 4
ans[3] = int(N % 3 == 0)
ans[2] = N//2 + 1 - ans[3]
ans[1] = ((N + 2) * (N + 1)//2 - 3 * ans[2] - ans[1])//6
print(sum(ans)%mod)