import java.io.FileInputStream
import java.util.*


var sc: Scanner = Scanner(System.`in`)
fun main(args: Array<String>) {
    if (args.size > 0) {
        System.setIn(FileInputStream(args[0]))
    }
    sc = Scanner(System.`in`)

    problem()

}

fun problem() {

    val A = sc.nextInt()
    val B = sc.nextInt()
    val C = sc.nextInt()

    if (A + B >= C) {
        println("Yes")
    }
    else {
        println("No")
    }

    //var ans = sortedList.joinToString("")
    //println(Q)
}
