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#include<iostream>
#include<cstdio>
#include<cmath>
#include<cstring>
using namespace std;
int main()
{
int n,a[2009],b=0;
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>a[i];
}
for(int i=1;i<=n;i++)
{
for(int j=i;j<=n;j++)
{
if(a[i]>a[j])
{
b++;
}
}
}
cout<<b;
return 0;
}
#include<cstdio>
#include<cmath>
#include<cstring>
using namespace std;
int main()
{
int n,a[2009],b=0;
cin>>n;
for(int i=1;i<=n;i++)
{
cin>>a[i];
}
for(int i=1;i<=n;i++)
{
for(int j=i;j<=n;j++)
{
if(a[i]>a[j])
{
b++;
}
}
}
cout<<b;
return 0;
}
