Hello Codeforces community.
It's been a long time since I last solved a problem on CF, so I decided I'd solve some Div. 2 As and Bs before I start solving Cs.
Anyway, I was solving problem 29B - Светофор, that's when I saw WA on test 12 after submitting it. What's weird isn't the WA in particular, it's the reason; "Can't find file C:\Contesters\Work\invoker-prod\work\codeforces2\b00a58c7139058a693e243e272a449d7\check-aa5f5d80dec38086488721f39ffc5878\run\output.fd0138e687.txt.".
For more information look at my submission below
As CF doesn't let you send the same code twice, I just added a small comment in my code and re-sent it. Surprise, AC.
You can find my submission with the same code but with an added comment below
Isn't this considered a fatal problem? Or is it just because it is an old problem so there are issues?
Imagine having a wrong answer verdict like this in a rated contest!