Please subscribe to the official Codeforces channel in Telegram via the link: https://t.me/codeforces_official.
×

Virtual contest is a way to take part in past contest, as close as possible to participation on time. It is supported only ACM-ICPC mode for virtual contests.
If you've seen these problems, a virtual contest is not for you - solve these problems in the archive.
If you just want to solve some problem from a contest, a virtual contest is not for you - solve this problem in the archive.
Never use someone else's code, read the tutorials or communicate with other person during a virtual contest.

No tag edit access

B. Sherlock and his girlfriend

time limit per test

1 secondmemory limit per test

256 megabytesinput

standard inputoutput

standard outputSherlock has a new girlfriend (so unlike him!). Valentine's day is coming and he wants to gift her some jewelry.

He bought *n* pieces of jewelry. The *i*-th piece has price equal to *i* + 1, that is, the prices of the jewelry are 2, 3, 4, ... *n* + 1.

Watson gave Sherlock a challenge to color these jewelry pieces such that two pieces don't have the same color if the price of one piece is a prime divisor of the price of the other piece. Also, Watson asked him to minimize the number of different colors used.

Help Sherlock complete this trivial task.

Input

The only line contains single integer *n* (1 ≤ *n* ≤ 100000) — the number of jewelry pieces.

Output

The first line of output should contain a single integer *k*, the minimum number of colors that can be used to color the pieces of jewelry with the given constraints.

The next line should consist of *n* space-separated integers (between 1 and *k*) that specify the color of each piece in the order of increasing price.

If there are multiple ways to color the pieces using *k* colors, you can output any of them.

Examples

Input

3

Output

2

1 1 2

Input

4

Output

2

2 1 1 2

Note

In the first input, the colors for first, second and third pieces of jewelry having respective prices 2, 3 and 4 are 1, 1 and 2 respectively.

In this case, as 2 is a prime divisor of 4, colors of jewelry having prices 2 and 4 must be distinct.

Codeforces (c) Copyright 2010-2018 Mike Mirzayanov

The only programming contests Web 2.0 platform

Server time: Dec/19/2018 15:49:40 (f1).

Desktop version, switch to mobile version.

Supported by

User lists

Name |
---|