import scala.io.StdIn

object Main extends App {
  val nums = StdIn.readLine().split(" ").map(_.toInt)
  val (a, b, c) = (nums.head, nums(1), nums(2))
  val result = a + b >= c match {
    case true => "Yes"
    case _ => "No"
  }
  println(result)
}