| Time Limit | $1$ 秒/Second(s) | Memory Limit | $512$ 兆字节/Megabyte(s) |
| 提交总数 | $2$ | 正确数量 | $2$ | "
| 裁判形式 | 标准裁判/Standard Judge | 我的状态 | 尚未尝试 |
| 难度 | 分类标签 |
Harvard linguistics professor George Kingsley Zipf (1902-1950) observed that the frequency of the kth most common word in a text is roughly proportional to 1/k. He justified his observations in a book titled Human behavior and the principle of least effort published in 1949. While Zipf's rationale has largely been discredited, the principle still holds, and others have afforded it a more sound mathematical basis.
Input consists of several test cases. The first line of each case contains a single positive integer n. Several lines of text follow which will contain no more than 10000 words. The text for each case is terminated by a single line containing EndOfText. EndOfText does not appear elsewhere in the input and is not considered a word.
For each test case, output the words which occur n times in the input text, one word per line, lower case, in alphabetical order. If there are no such words in input, output the following line:
There is no such word.Leave a blank line between cases.
2
In practice, the difference between theory and practice is always
greater than the difference between theory and practice in theory.
- Anonymous
Man will occasionally stumble over the truth, but most of the
time he will pick himself up and continue on.
- W. S. L. Churchill
EndOfText
between
difference
in
will
| 本题记录 | 用 户（点击查看用户） | 运行号（点击购买题解） | 时 间 |
|---|---|---|---|
| 算法最快[$40 $ms] | AOJ大管家 | 84446 | 2017-04-27 15:29:55 |
| 内存最少[$1924 $KB] | AOJ大管家 | 84446 | 2017-04-27 15:29:55 |
| 第一AC | AOJ大管家 | 84446 | 2017-04-27 15:29:55 |
| 第一挑战 | AOJ大管家 | 84446 | 2017-04-27 15:29:55 |
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