fun main(args: Array<String>) {
  val sc = if (args.size > 1) java.util.Scanner(java.io.File(args[1])) else java.util.Scanner(System.`in`)
  solve(sc)
}

fun solve(sc: java.util.Scanner) {
  val A = sc.nextInt()
  val B = sc.nextInt()
  val C = sc.nextInt()
  println(if (A + B >= C) "Yes" else "No")
}
