package main

import (
	"bufio"
	"fmt"
	"os"
	"sort"
	"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)
	aa := make([]int64, n)
	ss := make([]int64, n+1)
	for i := 0; i < n; i++ {
		aa[i] = getNextInt64(scanner)
	}
	sort.Slice(aa, func(i, j int) bool {
		return aa[i] < aa[j]
	})
	for i := 0; i < n; i++ {
		ss[i+1] = ss[i] + aa[i]
	}
	var ans int64
	for i := 0; i < n; i++ {
		l := 0
		r := min(i, n-i-1) + 1
		for l+1 < r {
			m := (l + r) >> 1
			if aa[i-m]+aa[n-m] < aa[i]*2 {
				r = m
				continue
			}
			l = m
		}
		s := ss[i+1] - ss[i-l] + ss[n] - ss[n-l] - aa[i]*int64(l<<1+1)
		if ans < s {
			ans = s
		}
		if i+1 == n {
			break
		}
		l = 0
		r = min(i, n-i-2) + 1
		for l+1 < r {
			m := (l + r) >> 1
			if aa[i-m]+aa[n-m] < aa[i]+aa[i+1] {
				r = m
				continue
			}
			l = m
		}
		s = ss[i+2] - ss[i-l] + ss[n] - ss[n-l] - (aa[i]+aa[i+1])*int64(l+1)
		if ans < s {
			ans = s
		}
	}
	fmt.Fprintln(writer, ans)
}
func min(a, b int) int {
	if a < b {
		return a
	}
	return b
}