Really good use of a dictionary

That's your point of view. Some could say it's to find an easy to maintain production-like piece of code. Others may want to play code golf and find the shortest possible solution. Others to find the most efficient one.

The point of these puzzles is to practice the implementation

Amazing solution xD

Am I the only stupid who dont understand this solution??

I became your fan for that

this is fine but a note has been put down there that the maximum height recorded is not necessarily the maximum height reached(as we are checking for every 10th of a second only, not for more smaller fractions), but this code violates this note, it takes the maximum height reached into consideration