QOJ.ac

QOJ

Time Limit: 1 s Memory Limit: 32 MB Total points: 100

#482. Dancing in Circles

الإحصائيات

$n$ kids attend a certain kindergarten. Everyday the kids arrange themselves in $k$ circles and dance. At least l kids dance in each circle. Two arrangements of children are considered distinct if there is a child who has a different right neighbour in one of the arrangements than in the other.

Your task is to calculate the number of all distinct arrangements modulo 2005. Should there be no arrangements satisfying the aforementioned conditions, the correct outcome is 0.

Write a programme which:

  • reads the numbers $n$, $k$ and $l$ from the standard input,
  • calculates the number $d'=d \bmod 2005$, where denotes the number of distinct arrangements of the children (dmod2005 denotes the remainder of the division of $d$ by $2005$),
  • writes $d'$ to the standard output.

Input

The first and only line of the standard input contains three integers separated by single spaces: $n$ - the number of children ($3 ≤ n ≤ 1\,000\,000\,000$), $k$ - the number of circles ($1 ≤ k ≤ n$) and $l$ - the minimal number of kids in a circle ($2 ≤ l ≤ n$).

Output

The first and only line of the standard output should contain a single integer: $d \bmod 2005$.

Example

Input

7 2 3

Output

420

Discussions

About Discussions

The discussion section is only for posting: Editorials, General Discussions (problem-solving strategies, alternative approaches), and Off-topic conversations.

This is NOT for reporting issues! If you want to report bugs or errors, please use the Issues section below.

Open Discussions 0
No discussions in this category.

Issues

About Issues

If you find any issues with the problem (statement, scoring, time/memory limits, test cases, etc.), you may submit an issue here. A problem moderator will review your issue.

Guidelines:

  1. This is not a place to publish discussions, editorials, or requests to debug your code. Issues are only visible to you and problem moderators.
  2. Do not submit duplicated issues. Submitting multiple issues may cause your account to be banned.
  3. Issues must be filed in English or Chinese only.
Active Issues 0
No issues in this category.
Closed/Resolved Issues 0
No issues in this category.