Getting into UCLA HELP!!?

Hi, so I'm in high school right now and i was told that the public school I'm gong to transfer to in 10th grade isn't that great and has a low percentage into getting into UCLA and I've asked around and heard that Troy High school and San Marisno high school are really good schools and also have a good change of getting into UCLA. Please don't say it doesn't matter what school i go to..only my grades matter etc...just do you guys know any good public high schools in LA? that makes it easier to get into UCLA?