fun main(args: Array<String>){
    val line: String = readLine() as String
    val abc=line.split(" ")
    val a = abc[0].toInt()
    val b = abc[1].toInt()
    val c = abc[2].toInt()
    if (a+b>=c){
        print("Yes")
    }else{
        print("No")
    }
}
