object Main {
  def main(args: Array[String]): Unit = {
    val sc = new java.util.Scanner(System.in)
    val n = sc.nextInt
    val list = List.fill(n)(sc.nextInt)
    if(list.max < list.sum - list.max){
      println("Yes")
    }
    else{
      println("No")
    }
  }
}