package main

import (
	"bufio"
	"fmt"
	"os"
	"strconv"
)

var sc = bufio.NewScanner(os.Stdin)

func Scanner() string {
	sc.Scan()
	return sc.Text()
}
func main() {
	buf := make([]byte, 0)
	sc.Buffer(buf, 100000007)
	sc.Split(bufio.ScanWords)
	n, _ := strconv.Atoi(Scanner())
	a := make([]int, n)
	b := make([]int, n)
	e := make([]int, n+1)
	num := 0
	for i := 0; i < n; i++ {
		a[i], _ = strconv.Atoi(Scanner())
	}
	for i := 0; i < n; i++ {
		b[i], _ = strconv.Atoi(Scanner())
	}

	ans := n
	for i := 0; i < n; i++ {
		for j := 0; j < n; j++ {
			e[j] = a[j] * n
		}
		for j := 0; j < n; j++ {
			for k, l := 0, 0; k < n; k++ {
				if e[k] < e[l] {
					l = k
					num = k
				}
			}
			e[num] += b[(i+j)%n]/2*n + 1
		}
		for j, k := 0, 0; j < n; j++ {
			num = max(k, e[j]%n)
			k = max(k, e[j]%n)
		}
		if ans > num {
			ans = num
		}
	}
	fmt.Println(ans)
}

func max(x int, y int) int {
	if x >= y {
		return x
	} else {
		return y
	}
}