Paint will NOT hide the order of cat or dog urine! If the floor has been painted Option 2 will not work! You have two options.

Option 1) Tear up your carpet. Tear out the wood flooring and put NEW wood down. Strip/remove the paint .
Option 2) This is a multistep process and will take most of the day to get done after you rip out the carpet in your bedroom or any other room.