import kotlin.math.max
import kotlin.math.min

val MOD = 1_000_000_007

fun main() {
  val (N) = readInts()
  val A = readLongs()

  if (N == 1 || N == 2) {
    println(0)
    return
  }

  A.sort()

  val cum = LongArray(N + 1)
  for (i in 0 until N) {
    cum[i + 1] = cum[i] + A[i]
  }

  var ans = 0L
  for (i in 0 until N) {
    var l = 0
    var h = min(i, N - 1 - i) + 1
    while(h - l > 1) {
      val m = (h + l) / 2
      if (A[N - 1 - m] + A[i - m] - A[i] * 2 >= 0) l = m
      else h = m
    }

    val v = cum[N] - cum[N - l] +
            cum[i] - cum[i - l] -
            A[i] * 2 * l

    debug{"i:$i l:$l v:$v"}
    ans = max(ans, v)
  }

  println(ans)
}












































private val isDebug = try {
  // なんか本番でエラーでる
  System.getenv("MY_DEBUG") != null
} catch (t: Throwable) {
  false
}

private fun readLn() = readLine()!!
private fun readStrings() = readLn().split(" ")
private fun readInts() = readStrings().map { it.toInt() }.toIntArray()
private fun readLongs() = readStrings().map { it.toLong() }.toLongArray()
private inline fun debug(msg: () -> String) {
  if (isDebug) System.err.println(msg())
}
private fun debug(a: LongArray) {
  debug{a.joinToString(" ")}
}
private fun debug(a: IntArray) {
  debug{a.joinToString(" ")}
}
private fun debug(a: BooleanArray) {
  debug{a.map{if(it) 1 else 0}.joinToString("")}
}
private fun debugDim(A: Array<IntArray>) {
  if (isDebug) {
    for (a in A) {
      debug(a)
    }
  }
}