object Main {
  def main(args: Array[String]): Unit = {
    solve
  }

  def solve(): Unit = {
    val sc = new java.util.Scanner(System.in)
    val a, b, c = sc.nextDouble()

    if(math.sqrt(a) + math.sqrt(b) < math.sqrt(c)) {
      println("Yes")
    }else {
      println("No")
    }
  }
}
