fun main(args: Array<String>) {
    a91(readLineList())
}

fun readLineList(): Array<String> {
    val lineList = mutableListOf<String>()
    while (true) {
        val line = readLine()
        if (line.isNullOrBlank()) {
            break
        } else {
            lineList.add(line!!)
        }
    }
    return lineList.toTypedArray()
}

fun a91(args: Array<String>) {
    if (args.size != 1) {
        throw IllegalArgumentException()
    }
    val (a, b, price) = args[0].split(" ").map { it.toInt() }
    println(if (a + b > price) "Yes" else "No")
}