题目链接：http://acm.hdu.edu.cn/showproblem.php?pid=1015 代码不知错在哪里了，求指导 题目： Problem Description === Op tech briefing, 2002/11/02 06:42 CST === "The item is locked in a Klein safe behind a painting in the second-floor library. Klein safes are extremely rare; most of ...