#include <bits/stdc++.h>

using namespace std;

/*-------------------------------*/
#define FOR(i, a, b) for(int i = (a); i < (b); i++)
#define RFOR(i, a, b) for(int i = (b) - 1; i >= (a); i--)
#define REP(i, n) for(int i = 0; i < (n); i++)
#define rep(i, n) for(int i = 0; i < (n); i++)
#define RREP(i, n) for(int i = (n) - 1; i >= 0; i--)
#define rrep(i, n) for(int i = (n) - 1; i >= 0; i--)
#define all(i) (i).begin(),(i).end()
#define rall(i) (i).begin(),(i).end(),greater<int>()
#define PB push_back
#define pb push_back
#define mp make_pair
#define FI first
#define SE second


typedef long long ll;
typedef pair<int, int> pint;
typedef vector<int> vi;
typedef vector<vector<int> > vii;
typedef vector<long long> llv;
typedef vector<pint> vpint;
/*-------------------------------*/

int main(void)
{
  int n;
  int a[108];

  while (true){
    cin >> n;
    if (n == 0) break;

    int cnt = 0;
    rep(i, n) cin >> a[i];

    rep(i, n){
      rep(j, n - 1){
        if (a[j] > a[j + 1]){
          swap(a[j], a[j + 1]);
          cnt++;
        }
      }
    }
    cout << cnt << endl;
  }

  return 0;
}