Origin
We are being attacked by aliens from
higher dimensions! If we cannot see the threat,
we must use math to understand how "close" it is to our
base at the origin.
Euclidean distance in n dimensions is:
When you fire a counter-missile, and it
reaches its target coordinates, it will blow up to a "ball" explosion of radius of 3 before shrinking back down.
Anything inside that ball of fire will be destroyed including our base at the origin so be careful! Protect us as long as you can! Good luck.