//10327
#include<stdio.h>
int main()
{
int n,temp,num[1001],flip,i,j;
while(scanf("%d",&n)==1)
{
for(i=1;i<=n;i++)
{
scanf("%d",&num[i]);
}
flip=0;
for(i=1;i<=n;i++)
{
for(j=1;j<=n;j++)
{
if((num[j+1]<num[j])&&(j+1!=n+1))
{
temp=num[j];
num[j]=num[j+1];
num[j+1]=temp;
flip++;
}
}
}
printf("Minimum exchange operations : %d\n",flip);
}
return 0;
}