package compe

object Main {
  def main(args: Array[String]): Unit = {
    val lis : Array[String] = io.StdIn.readLine().split(" ")
    var a : Int = strToInt(lis(0)).get
    var b : Int = strToInt(lis(1)).get
    var c : Int = strToInt(lis(2)).get
    if (a + b <= c)
      println("Yes")
    else
      println("No")
  }
  def strToInt(str: String): Option[Int] ={
    import scala.util.control.Exception._
    catching(classOf[NumberFormatException]) opt str.toInt
  }
}
