So, on the last round i wasnt at home, and therefore had to use another person's computer to do the contest. Waking up to close to the start time made me not be able to set up the IDE properly, so I thought "why not just use ideone"?

But what is Ideone anyway?

Well it says its an online compiler, so it must be a great alternative to a text editor to test things locally. However, little did I know that it was, in fact, a trap meticulously crafted by the devil, as I received those kind messages from codeforces:

There are 5 more of these.

Well, let me explain. This is what appears when you go into ideone:

Notice something wrong? Right at the corner of the screen there is a grayed out page called "recent codes", where you can see the recent submissions from people (for absolutely no reason). In fact, any code you post there is available for everyone to see! Such a distinguished feature! The only way to circumvent this is by noticing that that miniscule globe image right below the text box means that the whole world is seeing your solution.

Let's compare it with another site, pastebin. This is what appears when you access it:

Not only is it not a compiler to trick people doing coding competitions, but also its written public instead of an image you have to guess means public, and the public pastes appear on the same page as the one youre typing on, and they dont actually put stuff from people who arent logged on there. Considering logging on there is basically impossible (at least for me), most people are completely safe and happy.

So ok, ideone is bad and made you look like a fool, but why is it evil?

Well, let's find who is behind ideone (aside from the devil of course).

According to https://craft.co/ideone , it's Sphere Research Labs. Sphere... can you guess what it relates to? Yes, Sphere Online Judge, or SPOJ. We don't even have to go as far to confirm its the same company who takes care of both of them, look at the second result on google.

SPOJ itself said it!

And what does spoj have to do with it? See, SPOJ is an online judge, but it has another distinguished feature, it doesnt let you see other people's codes no mather what, which severely hampers the ability to learn coding tricks by looking at good corder's solutions. If the implications are not obvious, I'll let the words of the great brunovsky my own:

That settles it. The Sphere Research Labs are in fact a company design to destroy the lives of coders little by little. Not only do they do the shittiest judge imaginable (SPOJ, that has no one using it but still takes 3 hours to process your code that takes half a second to run, in addition to not having c++17), but at the same time create a trap website (ideone) in such a way that codeforces has to not punish cheaters so harshly, because they can just be someone who used it.

Extra Spice:

Looking at some of the submissions that were plagchecked with mine, we can see some interesting stuff, like this code for A, which was submitted a single minute after mine, and is in fact, completely identical. Not only that, but this freshly created account copied my codes for A, B and C, each of them shortly after i submit into codeforces. It is of my firm belief that this man, along with many others, is actually a bot (which can or cannot be setup by Sphere Research Labs) targetting naive people who trust ideone with their codeforces solutions, making them lose the rating they rightfully earned.

That being said, thanks for coming to my TED talk.

UPDATE:

Guys, good has won this battle. Sphere Research Labs has commented on this post and as of now, private is now the default version of ideone.

As means of reconciliation for the mean comments I've made about them, ideone will be now my go to online compiler, as well as the place i will be pasting code when i need to send someone.

I would like to thank everybody that helped on this cause and gave me contribution, we wouldnt have done this without your help. Im genuinely super happy. Have a great night everyone, history has been made today!