fun main(args : Array<String>) {
	val p1 = (readLine() ?: "").run { toInt() }
	val p2 = (readLine() ?: "").run { toInt() }
	val n = (readLine() ?: "").run { toInt() }
	val rLst = IntRange(1, n).map { readLine() ?: "" }.map { it.toInt() }

	val dupNum = rLst
		.groupBy { it }
		.filter { it.value.size > 1 }
		.map { it.value.size - 1 }
		.sum()
	
	println((p1 + p2) * dupNum)
}