package compe

object Main {
  def main(args: Array[String]): Unit = {
    val lis : Array[Int] = io.StdIn.readLine().split(" ").map(_.toInt)
    var a : Int = lis(0)
    var b : Int = lis(1)
    var c : Int = lis(2)
    if (c <= a + b)
      println("Yes")
    else
      println("No")
  }
}
