I have been studying in the library for couple of ...

I have been studying in the library for couple of weeks, it's getting cold every single day, especially at night.I cannot think of anything other than kicking us out of the library. Sometime I start doing push-ups to get some blood to my limbs. When i try to find a quite area, I study at the fifth floor because the warm air should have moved up at night but it gets colder as you move up to the next floor, that final floor needs just some snow.