import scala.io.StdIn._
import java.util.Scanner

object Main {
  def main(args: Array[String]) = {
    val s = new Scanner(System.in)
    val a = s.nextLong
    val b = s.nextLong
    val c = s.nextLong
    println(if (Math.sqrt(a) + Math.sqrt(b) < Math.sqrt(c)){ "Yes" } else { "No" })
  }
}