Let me introduce you to lequoctran181 a.k.a Lê Trần Quốc Anh, a shining star in the competitive programming community from National Economics University, Hanoi. He is a philosopher who talks about CP-ing quite a lot on his Facebook page, sharing tips, talking about his journey, etc...
I admit, he is skilled, but not at cp, but at cheating. The first time I paid attention to this account was in December of 2024, where he had 2 different templates, submitting C and D only around 10 minutes apart from each other, and achieving rank 35 on Educational Codeforces Round 172 (Rated for Div. 2), notice how he didn't space down, and the different way of naming variables:
Now, after this "achievement", of course, he would be very proud, as seen bragging about it here on the blog post of the round:
You can see this man is very egoistical individual, achieving CM through cheating, then proceeding to mock other contestants who were not able to do C, I confronted him about his different code styles, in which he gave me a reply:
However, is this really true? Does he really just have many templates saved on his computer that he would switch between them in between problems? Or is there more to this?
Well, let's take a look at his recent rounds, specifically Codeforces Round 1007 (Div. 2). Before I talk further about this, I would like to talk more about one of his ICPC teammate, Hà Quang Minh, who's also known as haminh1092005, or hqm1609 (both of these accounts are disabled in contests due to obviously cheating). Now, Mr. Minh here is a very close friend of Mr. Anh, this is pretty obvious because of how many posts on his Facebook profile where he mentioned Mr. Minh:
Now, what did Mr. Minh do in Codeforces Round 1007 (Div. 2), which also got him banned? That's a great question! He solved ABCD1D2 in just under 30 minutes! that's even faster than ksun48 :O, so how did that happen? Well, the answer is AI. Let's take a closer look at his submissions which got him banned:
Looking at this, some of you might say that this code looks completely normal! And I would almost have agreed, until I noticed some discrepancies:
Problem A included iostream instead of bits/stdc++.h, like every other submissions
unordered_map was used on problem D2, any seasoned competitive programmer would know better than to do this, in fact, this unordered_map was not needed at all.
The ways of naming variables resembles very closely to that of o3-mini.
That is too much of a coincidence, so I have came to a conclusion that this guy had sloppily edited the code which ChatGPT gave him, which got him caught, and eventually banned. Now, let's check on our friend lequoctran181, note that he started nearly one hour after the contest had started, and started with problem D1 and D2. But still, this could still be normal, he could've spent that nearly whole hour dedicating to doing just those two
But wait... what's this?
It's the exact same code that the user haminh1092005 had submitted with very little changes in variable names! What the hell? So this user is both multi-accounting and using LLM?
You're telling me someone who actually knows what they're doing is naming their variables like this? come on now, I would rather believe in Santa!
Fast forward to the present, today, on Teza Round 1 (Codeforces Round 1015, Div. 1 + Div. 2), lequoctran181 has had an extraordinary performance, solving ABCDEG1, which is equivalent to about ~2600 performance, and will get him to red after the rating changes happens, Let's check his code!
First, on problem C: 
unordered_map, again! I guess he didn't learn his lesson, despite saying that he would here :(, or maybe, he didn't even know what ChatGPT was giving him?
Now, C was only submitted 6 minutes after D, and his solution in 160 lines long! He must be a very fast coder! Now, let's take a look at his submission on problem E, on which he once again used unordered_map, guess he still didn't learn...
Lastly, he submitted G1 at near the end of the contest, do you guys think he also used his "magic" here? leave a comment and let me know below!
This is all I have. Before I go, take this lovely picture of the NEU.Newbies team standing together, which consists of the 2 cheaters and their teammate celebrating their performance in ICPC Hanoi National
