#include<bits/stdc++.h>
using namespace std;
unsigned long long int n,i,j,x,ans;
vector<int> a;
int main()
{
	cin>>n;
	for(i=1;i<=n;i++)
	{
		cin>>x;
		a.push_back(x);
	}
	for(i=1;i<n;i++)
	{
		for(j=i+1;j<=n;j++)
		{
			if(a[i]>a[j])
				ans++;
			else
				break;
		}
	}
	cout<<ans<<endl;
	return 0;
}

/**************************************************************
	Problem: 1777
	User: admin
	Language: C++
	Result: Accepted
	Time:4 ms
	Memory:2072 kb
****************************************************************/