package main

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

func configure(scanner *bufio.Scanner) {
	scanner.Split(bufio.ScanWords)
	scanner.Buffer(make([]byte, 1000005), 1000005)
}
func getNextString(scanner *bufio.Scanner) string {
	scanned := scanner.Scan()
	if !scanned {
		panic("scan failed")
	}
	return scanner.Text()
}
func getNextInt(scanner *bufio.Scanner) int {
	i, _ := strconv.Atoi(getNextString(scanner))
	return i
}
func getNextInt64(scanner *bufio.Scanner) int64 {
	i, _ := strconv.ParseInt(getNextString(scanner), 10, 64)
	return i
}
func getNextFloat64(scanner *bufio.Scanner) float64 {
	i, _ := strconv.ParseFloat(getNextString(scanner), 64)
	return i
}
func main() {
	fp := os.Stdin
	wfp := os.Stdout
	extra := 0
	if os.Getenv("I") == "IronMan" {
		fp, _ = os.Open(os.Getenv("END_GAME"))
		extra = 100
	}
	scanner := bufio.NewScanner(fp)
	configure(scanner)
	writer := bufio.NewWriter(wfp)
	defer func() {
		r := recover()
		if r != nil {
			fmt.Fprintln(writer, r)
		}
		writer.Flush()
	}()
	solve(scanner, writer)
	for i := 0; i < extra; i++ {
		fmt.Fprintln(writer, "-----------------------------------")
		solve(scanner, writer)
	}
}
func solve(scanner *bufio.Scanner, writer *bufio.Writer) {
	n := getNextInt(scanner)
	s := getNextInt(scanner) - 1
	t := getNextInt(scanner) - 1
	aa := make([]int64, n)
	m := map[state]int64{}
	var sum int64
	for i := 0; i < n; i++ {
		aa[i] = getNextInt64(scanner)
		sum += aa[i]
	}
	ans := aa[s] - aa[t]
	sum -= aa[s] + aa[t]
	aa[s] = 0
	aa[t] = 0
	fmt.Fprintln(writer, ans+eat(s, s, t, t, aa, sum, m)*2-sum)
}

func eat(l, r, ll, rr int, aa []int64, sum int64, m map[state]int64) int64 {
	if ans, exists := m[state{l, r, ll, rr}]; exists {
		return ans
	}
	n := len(aa)
	var a, b, c int64
	if aa[(l-1+n)%n] > 0 {
		c = aa[(l-1+n)%n]
		aa[(l-1+n)%n] = 0
		a = sum - eat(ll, rr, l-1, r, aa, sum-c, m)
		aa[(l-1+n)%n] = c
	}
	if aa[(r+1+n)%n] > 0 {
		c = aa[(r+1+n)%n]
		aa[(r+1+n)%n] = 0
		b = sum - eat(ll, rr, l, r+1, aa, sum-c, m)
		aa[(r+1+n)%n] = c
	}
	m[state{l, r, ll, rr}] = max(a, b)
	return m[state{l, r, ll, rr}]
}

type state [4]int

func max(a, b int64) int64 {
	if a < b {
		return b
	}
	return a
}