## 1000! Challenge

Description | Submit An Entry | Standings | Final Report |

This contest is a little different from other contests I've run. It's different in that it is being sponsored by a Guest Host who has created the problem and who is providing the prizes. If anyone else would like to Guest-Host a contest in the future, please contact me.

The Guest Host for the Kamenetsky 1000! Challenge is â€¦ (wait for the surprise) â€¦ Dmitry Kamenetsky.

This contest is identical to the recent Factorials
contest, with a few exceptions.
**If you are not familiar with the Factorials contest you should read its
description now**,
otherwise very little below will make any sense to you.

The ways in which the Kamenetsky 1000! Challenge differs from the Factorials contest are:

- The values of n are different.
- The notation for submitting solutions is different.
- The scoring system is different.
- The contest is shorter.
- The groups.io rules are different.
- The prizes are different.

### Which values of n?

Just n = 1000. No other values.

### What is the notation?

Instead of listing k+1 terms for a k-step solution, you will list k steps. For example, let's supposed you've created the 7-step solution (1, 2, 3, 6, 4, 24, 5, 120). In the Factorials contest you would have submitted the 8 terms:

```
1, 2, 3, 6, 4, 24, 5, 120
```

In this contest you would instead submit 7 steps for generating all but the first term:

```
0+0, 0+1, 1*2, 0+2, 3*4, 0+4, 5*6
```

Each step is in the form a◊b, which means take the a^{th} term
(0-based) and combine it with the b^{th} term using operation ◊
(+, - or *). Recall that the 0^{th} term is always 1.

### How is the scoring system different?

Your contest score is your raw score for n = 1000.

### How long is the contest?

Five weeks.

### What are the groups.io rules for this contest?

For this contest there are absolutely no restrictions on what you can share. In particular, you can share solutions and code.

### What is the prize?

Twenty-five Australian dollars.