i'm facing scarcity problem...

what's library for....??for studying??for sleeping??or for a place to 'cold' down the heat??haha...for me now...
library is for a place let me have a cooling place to online...haha...just because of the paking here are limited...just like the economics...human beings' have unlimited wants...but our resources are limited...so that sun-uers are facing the scarcity problem...^^ we have to allocate the resources efficiently to satisfy our unlimited wants...so we have the opportunity costs...my opportunity costs is sleeping...haha...so i'm in the library to use my time...^^