I was in the pool, getting out when a friend of mine goes to take my towel on the lounge chair. Not knowing my?

phone was in the towel, he slings it onto his body. My phone is flung into the pool, and my other friend dives in and gets it. I take the battery and sim card out to dry. I wait a good 10 minutes to put it back in and the phone works fine. Then shuts off after about a minute, then take out the battery and sim to dry the whole night. Now the phone lights up as it works but the screen doesn't appear. What should i replace?