this had me thinking like 2 whole days, aint no way this is easyyy
but it was fun tho
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It was fun.
I handled shift down of aircrafts when they arenât targetable before they reach altitude boundaries .
Itâs badly that this kind of scenario wasnât checked by validators/test.
Because this usecase need more work on implementations.
This puzzle was supposed to be a CoC so I didnât made it too difficult. Every aircraft can be shot. Maybe I should have added unreachable aircraft ⌠I didnât think about it when I made this puzzle as an easy one.
Description is certainly lacking, it should clearly describe all possible (and impossible) conditions.
For example, what happens if planes collide?
Is it always possible to shoot all planes?
Does the missile gets destroyed when it hits the plane, or does it travel further?
I know certain things might be obvious, but all assumptions on input data should be unambiguous
Yes it was obvious for me, and nobody asked me to add these informations when the puzzle wasnât approved yet.
The statement has been updated, thanks for your feedback.
I really enjoyed that, thanks!
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Yes, very good one, thank you 
is there any other test case? having the same problem as the above comment
Thank you, this is a really nice puzzle. Concise and intriguing.
I have passed all the testcases. I also tested it with multiple hardcore scenarios including the one you suggested but after submitting I only receive 75% score. I have spent half my day on it and just need that 100% as a compensate.
Are you failing âHold the lineâ? See here: [Community Puzzle] Shoot Enemy Aircraft - #15 by Remi
i did it and all tests were correct but when i submit my code, i take 75% 
Took me two days to understand there is a simple solution without actually drawing the missiles 