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请问这道题需要考虑哪些临界条件呢

Posted by ptolemylsl at 2004-10-23 21:56:12 on Problem 1617
修改了几天了
按照题目的意思给出的输入都能够正常输出
可是提交的时候还总是WA
不知道是不是因为临界的问题没有考虑清楚
请问各位高手这个题目需要考虑哪些临界情况呢
譬如key的长度为0等

提交成功的是否能够给出代码参考一下

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