#define _USE_MATH_DEFINES
#include <bits/stdc++.h>
using namespace std;
signed main() { 
  ios::sync_with_stdio(false); cin.tie(0);
  int n;
  cin >> n;
  vector<long long> a(n + 1);
  for (int i = 1; i <= n; i++) {
    cin >> a[i];
  }
  sort(a.begin(), a.end());
  vector<long long> sum(n + 1);
  for (int i = 1; i <= n; i++) {
    sum[i] = sum[i - 1] + a[i];
  }
  long long ans = 0;
  for (int i = 1; i <= n; i++) {
    int lo = 0, hi = min(i - 1, n - i) + 1;
    while (hi - lo > 1) {
      int mid = (lo + hi) >> 1;
      if (a[n - mid + 1] - a[i] >= a[i] - a[i - mid]) lo = mid;
      else hi = mid;
    }
    ans = max(ans, sum[n] - sum[n - lo] + sum[i - 1] - sum[i - 1 - lo] - lo * a[i] * 2);
  }
  cout << ans << '\n';
  return 0;
}