import java.util.Arrays;
import java.util.Scanner;

public class Main {
	public static void main(String[] args) throws Exception {
		Scanner sc = new Scanner(System.in);
		int n = sc.nextInt();
		int[] t = new int[n];
		for (int i = 0; i < n; i++) {
			t[i] = sc.nextInt();
		}
		sc.close();

		Arrays.sort(t);
		long sum = 0;
		for (int i = 0; i < n; i++) {
			sum += t[i];
		}

		long ans = 0;
		for (int i = 0; i < n; i++) {
			sum -= t[i];
			long v1 = t[i] * (n - 1L - i);
			long v2 = sum - v1;
			ans += v2;
		}
		System.out.println(ans);
	}
}