#include <bits/stdc++.h>
using namespace std;
using ll = long long;

int main() {
	ios::sync_with_stdio(false);
	cin.tie(0);
    int n;
    cin >> n;
    vector<int> T(n);
    for(auto &&v : T) cin >> v;
    sort(T.begin(), T.end());
    ll ans = 0;
    for(int i = 0; i < n; i++){
        ans += T[i] * (long long)((i) - (n - 1 - i));
    }
    cout << ans << '\n';
}