object Main extends App {
  val in = scala.io.Source.stdin.getLines.toSeq
  val ls = in.map(_.split(' ').map(_.toLong))
  val A = ls(0)(0)
  val B = ls(0)(1)
  val C = ls(0)(2)
  
  //A + B + 2sqrt(AB) < C
  val left = Math.sqrt(A.toLong * B) * 2
  val right = C.toLong - A - B
  println(left)
  println(right)
  val ret = left < right 
  println(if(ret) "Yes" else "No")
}
