#include<iostream>
#include<cstdio>
#include<cstdlib>
#include<cstring>
#include<algorithm>
#include<cmath>
using namespace std;
unsigned long long n,w[30005]={0},q[30005]={0},answer=0;
int main()
{
	freopen ("three.in","r",stdin);
	freopen ("three.out","w",stdout);
	cin>>n;
	for (int i=1;i<=n;i++)
	{
		cin>>w[i];
		for (int j=1;j<i;j++)
		{
			if (w[j]<w[i])
				q[i]++;
		}
	}
	for (int i=3;i<=n;i++)
	{
		for (int j=1;j<n;j++)
		{
			if (q[j]>0&&w[j]<w[i])
			{
				answer+=q[j];
			}
		}
	}
	cout<<answer;
	return 0;
}