---
# System prepended metadata

title: About Cheating AtCoder in Kirirom Institute of Technology
tags: [atcoder, EN, report]

---

# About Cheating AtCoder in Kirirom Institute of Technology

###### tags: `report` `atcoder` `EN`

There is a possibility that some student shared code at Atcoder Beginner Contest 153 on 26/Jan. On that point it is thought that their result is unaccompanied with real ability. If some students shared code, it is against the rules for AtCoder. (This action is prohibited matter No.3) Atcoder result is rated by under relative evaluation.

![](https://i.imgur.com/ChogUig.png)
![](https://i.imgur.com/MmgYBof.png)
![](https://i.imgur.com/ufyiI8Q.png)

##### About Using SNS at Contest↓
![](https://i.imgur.com/vC0i0pf.png)
(Translate Japanese into English↓)

```
Posting information that is open to all humans are fine.
ex) 1.Nunber of AC(Answer Correct)
    2.First person who got AC.
    3.The remark for example "All correct"
```
```
About Impression of AtCoder
ex) 1.The remark for example "It was fun" is fine.
    2.But Don't include content that mentions the Question.
```
```
About contents that must not be posted
1. Contents that contain the answer.
2. Number of WA(wrong answer), TLE, test case. These are　published when contest is finished.
3. Showing the answer process. Giving hint to other person.
4. Question edited by you. A part of the question.
```
**Why we found cheating.**
When we check the students rank's, there were artificial time record. We then checked code. Some students submitted the same code.
![](https://i.imgur.com/Q5j1HeG.png)
![](https://i.imgur.com/Frpm7LD.png)
![](https://i.imgur.com/hzan91D.png)
![](https://i.imgur.com/JkzHAx0.png)

The students who answers the D question correctly may be cheating. But that was probably a coincidence and some students might be able to solve the D problem on their own. But There are obviously many artificial answer.(For example No.8 and No.13. Their answer time is too short)
![](https://i.imgur.com/5auZUUU.png)
