#include<stdio.h>
int main()
{
    int n,i,j,k,ara[1000],temp,count;
    while(scanf("%d",&n)==1)
    {
        for(i=0; i<n; i++)
        {
            scanf("%d",&ara[i]);
        }
        count=0;
        for(i=0; i<n; i++)
        {
            for(j=0; j<n-1; j++)
            {
                if(ara[j]>ara[j+1])
                {
                    temp=ara[j];
                    ara[j]=ara[j+1];
                    ara[j+1]=temp;
                    count++;
                }
            }
        }
        printf("Minimum exchange operations : %d\n",count);
    }
    return 0;
}