```cpp
#include<bits/stdc++.h>
using namespace std;
int a[10005],n,x;
int main()
{
cin>>n;
for(int i=0;i<n;i++)
{
cin>>a[i];
}
for(int i=0;i<n;i++)
{
for(int j=0j<i;j++)
{
if(a[j]>a[i]){
x++;
}
}
cout<<x<<endl;
return 0;
}
by nightwatch_ryan @ 2023-10-17 21:34:33
@[chenxinuo](/user/999263)
by nightwatch_ryan @ 2023-10-17 21:35:45
@[nightwatch_ryan](/user/961351) xiexie AC
by chenxinuo @ 2023-10-17 21:35:57