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)
	ss := make([]int64, n+1)
	for i := 0; i < n; i++ {
		aa[i] = getNextInt64(scanner)
		ss[i+1] = ss[i] + aa[i]
	}
	if s < t {
		r := (s + t) >> 1
		l := r - (n+1)>>1
		if (t-s)%2 == 0 {
			if t-r+1 > n>>1 {
				fmt.Fprintln(writer, calc(l+1, r+1, ss)*2-ss[n])
				return
			}
			fmt.Fprintln(writer, max(calc(l, r, ss), calc(l+1, r+1, ss))*2-ss[n])
			return
		}
		fmt.Fprintln(writer, calc(l+1, r+1, ss)*2-ss[n])
		return
	}
	l := (s + t) >> 1
	r := l + (n+1)>>1
	if (s-t)%2 == 0 {
		if l-t > n>>1 {
			fmt.Fprintln(writer, calc(l, r, ss)*2-ss[n])
			return
		}
		fmt.Fprintln(writer, max(calc(l, r, ss), calc(l+1, r+1, ss))*2-ss[n])
		return
	}
	if l == t {
		fmt.Fprintln(writer, calc(l+1, r+1, ss)*2-ss[n])
		return
	}
	fmt.Fprintln(writer, calc(l, r, ss)*2-ss[n])

}

func calc(l, r int, ss []int64) int64 {
	if l < 0 {
		return ss[r] + ss[len(ss)-1] - ss[len(ss)-1+l]
	}
	if r >= len(ss) {
		return ss[len(ss)-1] - ss[l] + ss[r%len(ss)+1]
	}
	return ss[r] - ss[l]
}
func max(a, b int64) int64 {
	if a < b {
		return b
	}
	return a
}