import java.io.BufferedReader;
import java.io.InputStreamReader;
import java.util.Arrays;

public class Main {
	public static void main(String[] args) throws Exception {
		BufferedReader br = new BufferedReader(new InputStreamReader(System.in));
		int n = Integer.parseInt(br.readLine());
		String[] sa = br.readLine().split(" ");
		long[] a = new long[n];
		for (int i = 0; i < n; i++) {
			a[i] = Integer.parseInt(sa[i]);
		}
		br.close();

		if (n <= 2) {
			System.out.println(0);
			return;
		}

		Arrays.parallelSort(a);
		long[] b = new long[n + 1];
		for (int i = 0; i < n; i++) {
			b[i + 1] = b[i] + a[i];
		}

		long ans = 0;
		for (int i = 1; i < n - 1; i++) {
			int ok = 1;
			int ng = Math.min(i + 1, n - i);
			while (Math.abs(ng - ok) > 1) {
				int mid = (ng + ok) / 2;
				if (calc(a, i, mid)) {
					ok = mid;
				} else {
					ng = mid;
				}
			}
			long val = b[i] - b[i - ok] + b[n] - b[n - ok];
			val -= a[i] * ok * 2;
			ans = Math.max(ans, val);
		}
		System.out.println(ans);
	}

	static boolean calc(long[] a, int i, int mid) {
		int n = a.length;
		long m = a[i] - a[i - mid];
		long p = a[n - mid] - a[i];
		return p >= m;
	}
}