Test cases failing for Merge K Lists

Can someone tell me the reason why only one Test Case (Test-case 0) is passing while all others are failing on submitting my code?

I can’t understand what you are trying to say, which post you are talking about ?

plz share the c++ code
as you are asking doubt on c++ course

or
make a new doubt and mention in the title python

My doubt is not from C++ course it is from -> Master Interview Questions for FAANG & Product Companies course

Does I need to mention python in title each time if My code is written in Python ?

can you join this meet now?

Yes, I sent allow-join request

You are not here, hence I am leaving, I try to join again at 11:45am sharp

you can join now …

ok, i am joining again now