1084. Broken Keyboard (20)

最新推荐文章于 2021-01-20 19:05:25 发布

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最新推荐文章于 2021-01-20 19:05:25 发布

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本文介绍了一个编程问题——BrokenKeyboard，该问题是关于键盘某些键损坏后，如何找出这些损坏的键。输入包括原始字符串和实际打出来的字符串，输出则是损坏的键列表。案例展示了如何根据两个字符串来确定损坏的键。

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1084. Broken Keyboard (20)
时间限制 200 ms 内存限制 65536 kB 代码长度限制 16000 B
判题程序 Standard 作者 CHEN, Yue
On a broken keyboard, some of the keys are worn out. So when you type some sentences, the characters corresponding to those keys will not appear on screen.
Now given a string that you are supposed to type, and the string that you actually type out, please list those keys which are for sure worn out.
Input Specification:
Each input file contains one test case. For each case, the 1st line contains the original string, and the 2nd line contains the typed-out string. Each string contains no more than 80 characters which are either English letters [A-Z] (case insensitive), digital numbers [0-9], or “_” (representing the space). It is guaranteed that both strings are non-empty.
Output Specification:
For each test case, print in one line the keys that are worn out, in the order of being detected. The English letters must be capitalized. Each worn out key must be printed once only. It is guaranteed that there is at least one worn out key.
Sample Input:
7_This_is_a_test
_hs_s_a_es
Sample Output:
7TI