import java.util.Scanner

object Main {
  def main(args:Array[String]) = {
    val sc = new Scanner(System.in)
    val N = sc.nextInt()
    if (3 <= N && N <= 100) {
      val Ls = List.fill(N)(sc.nextInt())

      val s = Ls.sortWith((a, b) => a > b)
      if (s.head < s.tail.sum) println("Yes") else println("No")
    } else {
      println("No")
    }

  }
}