http://www.cn210.com/onlinejudge/problemshow.php?pro_id=98 我们的OJ Description </center> Input The next line contains the numbers of S: x1, x2, ..., xn. It is known that each xi is an integer, 0 ≤ xi ≤ 2*109. The input data set is correct and ends with an end of file. </div> Output Sample Input 2 1 2 3 1 3 9 4 1 2 3 6 Sample Output 1 12 4 首先由于行列式交换