Pro.ID21128 TitleDictionary Title链接http://10.20.2.8/oj/exercise/problem?problem_id=21128 AC34 Submit132 Ratio25.76% 时间&空间限制描述Authors of the new, all-in-one encyclopedia have organized the titles in the order they consider most appropriate for their readers. It's not always alphabetical, because they want to observe some peculiar relationships between them. However, they still want to allow users to look up titles quickly. They achieve this by adding a carefully calculated number of spaces before every title in the list of titles. They call this structure a dictionary. A dictionary is represented by a list of words with some number of spaces before certain words. Dictionary format can be described as a set of constraints on sequences of consecutive words starting with the same letter. Any maximal sequence of consecutive words starting with the same letter should satisfy the following rules:
The authors don't feel like giving you a more detailed explanation of what a dictionary is, so they have included an example (see sample input and output) that clarifies their definition. Your task is to write a program that will convert a given list of words into a dictionary by adding some number of spaces before certain words and preserving the original order of the words. 输入The input consists of at least one and most 100000 words. Each word consists of at least one and at most 10 lower-case letters. There will be no leading or trailing spaces. There will be no blank lines between the words, but there may be an arbitrary number of blank lines at the end of the file. 输出Description Authors of the new, all-in-one encyclopedia have organized the titles in the order they consider most appropriate for their readers. It's not always alphabetical, because they want to observe some peculiar relationships between them. However, they still want to allow users to look up titles quickly. They achieve this by adding a carefully calculated number of spaces before every title in the list of titles. They call this structure a dictionary. A dictionary is represented by a list of words with some number of spaces before certain words. Dictionary format can be described as a set of constraints on sequences of consecutive words starting with the same letter. Any maximal sequence of consecutive words starting with the same letter should satisfy the following rules:
The authors don't feel like giving you a more detailed explanation of what a dictionary is, so they have included an example (see sample input and output) that clarifies their definition. Your task is to write a program that will convert a given list of words into a dictionary by adding some number of spaces before certain words and preserving the original order of the words. Input The input consists of at least one and most 100000 words. Each word consists of at least one and at most 10 lower-case letters. There will be no leading or trailing spaces. There will be no blank lines between the words, but there may be an arbitrary number of blank lines at the end of the file. Output Write to the output the original words in the same order without any trailing spaces but with the appropriate number of leading spaces, so that this word list is a dictionary. There should be no blank lines between the words, but there may be an arbitrary number of blank lines at the end of the file. Sample Input a Sample Output NOTE: For reading convenience spaces are replaced with '.' characters. Your output file should contain spaces instead. a Source 样例输入a 样例输出NOTE: For reading convenience spaces are replaced with '.' characters. Your output file should contain spaces instead. a 作者 |
|Archiver|手机版|小黑屋|同和创作矩阵
( 粤ICP备20019636号-1 )
GMT+8, 2025-2-2 11:46 , Processed in 0.018808 second(s), 14 queries .
Powered by Discuz! X3.4 Licensed
© 2001-2017 Comsenz Inc.
