just bought a home and there is a cat urine smell

I will try the lemon juice and white vinegar I put hydrogen peroxide on the vinyl flooring today and have not been to the house to smell if it worked. I have my own cats and they are box trained and we move in a week to our new home with the smell of someones neglect of their pet. I had no idea the smell was hard to get rid of when I bought the house thought it would go away I am going to clean this until I die HELP!