func main()
	var ss: [][]char
	do ss :: cui@input().split(" ")
	var n: int :: ss[0].toInt(&)
	var m: int :: ss[1].toInt(&)
	var k: int :: ss[2].toInt(&)
	do ss :: cui@input().split(" ")
	var op: char :: ss[0][0]
	var b: []int :: #[m]int
	for i(1, m)
		do b[i - 1] :: ss[i].toInt(&)
	end for
	var a: []int :: #[n]int
	for i(0, n - 1)
		do a[i] :: cui@input().toInt(&)
	end for
	do a.sort()
	do b.sort()
	do b.reverse()
	
	var f: func<(int, int): int>
	func add(x: int, y: int): int
		ret x + y
	end func
	func product(x: int, y: int): int
		ret x * y
	end func
	do f :: (op = '+') ?(add, product)
	
	var ans: int :: 0
	var idx: int :: 0
	for i(0, n - 1)
		while(idx <> m & f(a[i], b[idx]) >= k)
			do idx :+ 1
		end while
		do ans :+ idx
	end for
	
	do cui@print("\{ans}\n")
end func