#define _USE_MATH_DEFINES
#include "bits/stdc++.h"
using namespace std;
#define FOR(i,j,k) for(int (i)=(j);(i)<(int)(k);++(i))
#define rep(i,j) FOR(i,0,j)
#define each(x,y) for(auto &(x):(y))
#define mp make_pair
#define MT make_tuple
#define all(x) (x).begin(),(x).end()
#define debug(x) cout<<#x<<": "<<(x)<<endl
#define smax(x,y) (x)=max((x),(y))
#define smin(x,y) (x)=min((x),(y))
#define MEM(x,y) memset((x),(y),sizeof (x))
#define sz(x) (int)(x).size()
#define RT return
using ll = long long;
using pii = pair<int, int>;
using vi = vector<int>;
using vll = vector<ll>;

void solve() {
    int N;
    cin >> N;
    vi A(N);
    rep(i, N) {
        cin >> A[i];
    }
    sort(all(A));
    vll sum(N + 1);
    rep(i, N) {
        sum[i + 1] = sum[i] + A[i];
    }
    ll ans = 0;
    rep(i, N) {
        int median = A[i];
        int ok = 0, ng = min(N - i, i + 1);
        while (ng - ok > 1) {
            int x = (ok + ng) / 2;
            if (A[i - x] + A[N - i] - 2 * median > 0)ok = x;
            else ng = x;
        }
        smax(ans, (sum[i] - sum[i - ok]) + (sum[N]-sum[N-ok]) - 2ll*median*ok);
    }

    rep(i, N - 1) {
        int median2 = A[i] + A[i + 1];
        int ok = 0, ng = min(N - (i + 1), i + 1);
        while (ng - ok > 1) {
            int x = (ok + ng) / 2;
            if (A[i - x] + A[N - i] - median2 > 0)ok = x;
            else ng = x;
        }
        smax(ans, (sum[i] - sum[i - ok]) + (sum[N] - sum[N - ok]) - median2 * ok);
    }

    cout << ans << endl;
}

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
	cout << fixed << setprecision(15);
	solve();
	return 0;
}