#include <bits/stdc++.h>
using namespace std;
typedef pair<int,int> ii;
typedef long long ll;
typedef vector<int> vi;
typedef vector<ll> vll;
typedef vector<vi> vvi;
typedef vector<ii> vii;
typedef vector<vii> wgraf;
typedef pair<int,ii> edge;
#define UNVISITED 0
#define VISITED 1
#define INF 1000000000
#define pb push_back
#define F first
#define S second
#define all(x) (x).begin(), (x).end()
ll ans = 0;
void RESOLVER(){
int n;
cin >> n;
vi data(n);
for (auto &i : data) cin >> i;
for (int i = 0; i < n; i++){
int iz = 0, der = 0;
for (int j = i - 1; j >= 0; j--){
if (data[j] < data[i]) iz++;
}
for (int j = i + 1; j < n; j++){
if (data[j] < data[i]) der++;
}
ans += (der * iz);
}
cout << ans;
}
int main(){
ios_base::sync_with_stdio(false);
cin.tie(NULL);
int t = 1;
//cin >> t;
while(t--){
RESOLVER();
}
}
