object Main extends App {
  val in = scala.io.Source.stdin.getLines.toSeq
  val ls = in.map(_.split(' ').map(_.toLong))
  val A = ls(0)(0).toLong
  val B = ls(0)(1).toLong
  val C = ls(0)(2).toLong
  
  //A + B + 2sqrt(AB) < C
  //val left = Math.sqrt(A.toLong * B) * 2
  //val right = C.toLong - A - B
  val left = A * B * 4
  val right = C*C - B*C*2 - C*A*2 + A*A + B*B + A*B*2
  //println(left)
  //println(right)
  val ret = left < right 
  println(if(ret) "Yes" else "No")
}
