These are the results of the national teams:

As you can see, one of the national teams of the Green team, probably for techical problems, couldn't escape from the room, so the Green team is at the end of the rank.

This is the rank of the other teams, calculating the average delivery time:

So... the winner is the ORANGE TEAM!

Congratulations to all the students, because they tried hard and worked very well, with very good delivery times!