[第k小数](https://github.com/soulmachine/acm-cheat-sheet/wiki/%E7%AC%ACk%E5%B0%8F%E7%9A%84%E5%85%83%E7%B4%A0)这一页的第一段代码测试出错了: A = [9, 4, 1, 6, 7, 3, 8, 2, 5] select(A, 0, len(A) - 1, 5) Expected:5 Output:6