#include <bits/stdc++.h>
using namespace std;
using ll = long long;
ll A[555], B[555];
int main () {
	int N;
	cin >> N;
	fill(A, A + 505, 0ll);
	fill(B, B + 505, 0ll);
	ll ans = 0;
	for (int i = 0; i < N; i ++) {
		ll a;
		cin >> a;
		ll p = 0, q = 0;
		for (ll x = 0; x < a; x ++) {
			p += A[x];
			q += B[x];
			ans += i * p + q;
		}
		for (ll x = 502; x > a; x --) {
			p += A[x];
			q += B[x];
			ans += i * p + q;
		}
		A[a] ++;
		B[a] -= i;
	}
	cout << ans * 2 << endl;
}