#include <bits/stdc++.h>
int main() {
  int a, b[100], i, j, c, count = 0;
  while (scanf("%d", &a) != 0) {
    if (a == 0) break;
    for (i = 0; i < a; i++) scanf("%d", &b[i]);
    for (i = 0; i < a - 1; i++) {
      for (j = i + 1; j < a; j++) {
        if (b[i] < b[j]) {
          c = b[i];
          b[i] = b[j];
          b[j] = c;
          count++;
        }
      }
    }
    printf("%d\n", count);
    count = 0;
  }
  return 0;
}
