object Main{
  def main(args: Array[String]){
      	val ct1 = io.StdIn.readLine
    	val ct = io.StdIn.readLine().split(" ").map(_ .toInt)
    val mx = ct.max
		val ret = if((ct.sum - mx) > mx){
        "Yes"
        }else{
          "No"
        }
      println(ret);
  }
}