object Main extends App {
  import io.StdIn._
  val numberOfLine = readLine().split(' ').map(_.toInt).head
  val lineLengths = readLine().split(' ').map(_.toInt)
  val longestLine = lineLengths.max
  if (longestLine < (lineLengths.sum - longestLine)) {
    println("Yes")
  } else {
    println("No")
  }
}