package main

import . "fmt"
import . "os"
import bf "bufio"

func main() {
	rd:=bf.NewReader(Stdin)
	var n int
	var d int64
	Fscan(rd, &n,&d)
	x:=make([]int64, n)
	v:=make([]int64, n)
	var s int64
	for i:=range x {
		Fscan(rd,&x[i])
	}
	for i:=range v {
		Fscan(rd,&v[i])
		s += v[i]
	}
	Println((d+s-1)/s)
}