#include <stdio.h>

int main(void)
{
	int N;
	int i, j;
	int count;
	int box[100];
	int tmp;
	
	while (1){
		scanf("%d", &N);
		if (N == 0){
			break;
		}
		
		count = 0;
		
		for (i = 0; i < N; i++){
			scanf("%d", &box[i]);
		}
		for (i = 0; i < N - 1; i++){
			for (j = 0; j = N - i - 1; j++){
				if (box[j] > box[j + 1]{
					tmp = box[j];
					box[j] = box[j + 1];
					box[j + 1] = tmp;
					
					count++;
				}
			}
		}
	}
	printf("%d\n", count);
	
	return (0);
}