Can you work this out?

You have 5 pieces of chain, each consisting of 3 links. You want to make one long chain of these 5 pieces. Breaking open a link costs one euro, and welding an open link costs 3 euros.
Is it possible to make one long chain of the 5 pieces if you have just 12 euros?

This kind of "difficult but fun to solve problem" is called a brainteaser.
Do you know any other to share?