package main

import . "fmt"

func main() {
	var n int
	Scan(&n)
	a:=make([]int,n)
	b:=make([]int,n)
	for i:=range a {
		Scan(&a[i])
	}
	for i:=range b {
		Scan(&b[i])
	}
	dp:=make([]map[int]map[int]int,n+1)
	for i:=range dp {
		dp[i]=make(map[int]map[int]int)
	}
	dp[0][0]=map[int]int{0:1}
	for i,v:=range a {
		for k,m:=range dp[i] {
			for j,w:=range b {
				p:=1<<j
				if (k&p)!=0 {
					continue
				}
				if dp[i+1][k|p]==nil {
					dp[i+1][k|p]=make(map[int]int)
				}
				for s,c:=range m{
					if v>w {
						s+=v-w
					}
					dp[i+1][k|p][s]+=c
				}
			}
		}
	}
	var ss,cc int
	for _,m:=range dp[n] {
		for s,c :=range m {
			if s>ss {
				ss=s
				cc=c
			} else if s==ss {
				cc+=c
			}
		}
	}
	Println(cc)
	
	
	
}