Paper and paper boards are disposed into the blue containers. If you put a cardboard box into the container the container will be full with only 3 boxes. If you rip it and/or fold it up, then further 30 boxes will fit into the container. Please think about these subsequent 30 users because the municpal waste service will not empty the containers every day.
On the other hand take care not to be injured by the paper boards especially if they are clipped with wire clips. Ask the caretaker for a cardboard cutter if necessary.
If you dispose paper carefully watch what is written there. Paper with personal data must not be disposed into public containers! Use a paper shredder or ask for the next container for waste files.