388. Longest Absolute File Path
来源:互联网 发布:php打印空格 编辑:程序博客网 时间:2024/06/10 17:58
Suppose we abstract our file system by a string in the following manner:
The string "dir\n\tsubdir1\n\tsubdir2\n\t\tfile.ext"
represents:
dir subdir1 subdir2 file.ext
The directory dir
contains an empty sub-directory subdir1
and a sub-directory subdir2
containing a file file.ext
.
The string "dir\n\tsubdir1\n\t\tfile1.ext\n\t\tsubsubdir1\n\tsubdir2\n\t\tsubsubdir2\n\t\t\tfile2.ext"
represents:
dir subdir1 file1.ext subsubdir1 subdir2 subsubdir2 file2.ext
The directory dir
contains two sub-directories subdir1
and subdir2
. subdir1
contains a file file1.ext
and an empty second-level sub-directory subsubdir1
. subdir2
contains a second-level sub-directory subsubdir2
containing a file file2.ext
.
We are interested in finding the longest (number of characters) absolute path to a file within our file system. For example, in the second example above, the longest absolute path is "dir/subdir2/subsubdir2/file2.ext"
, and its length is 32
(not including the double quotes).
Given a string representing the file system in the above format, return the length of the longest absolute path to file in the abstracted file system. If there is no file in the system, return 0
.
Note:
- The name of a file contains at least a
.
and an extension. - The name of a directory or sub-directory will not contain a
.
.
Time complexity required: O(n)
where n
is the size of the input string.
Notice that a/aa/aaa/file1.txt
is not the longest file path, if there is another path aaaaaaaaaaaaaaaaaaaaa/sth.png
.
class Solution(object): def lengthLongestPath(self, input): """ :type input: str :rtype: int """ if not input or "." not in input: return 0 maxLen = 0 parts = input.split("\n") # dummy: depth -1 --> 0, for case where only one level and that is a file! # pathLen: key-->depth, val: accumulative length # since the input is DFS, the accu. length is always for current file, # so it is ok to update maxLen whenever meet a file pathLen = {-1:0} for part in parts: name = part.replace("\t", "") depth = len(part) - len(name) if depth not in pathLen: pathLen[depth] = 0 if "." in name: # if file pathLen[depth] = pathLen[depth-1] + len(name) maxLen = max(pathLen[depth], maxLen) else: # if dir pathLen[depth] = pathLen[depth-1] + len(name) + 1 # +1 --> '/' return maxLen
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- 388. Longest Absolute File Path
- Longest Absolute File Path
- Longest Absolute File Path
- LeetCode—388. Longest Absolute File Path
- LeetCode—388. Longest Absolute File Path
- leetcode -- 388. Longest Absolute File Path
- 388. [LeetCode]Longest Absolute File Path
- [Leetcode]388. Longest Absolute File Path
- 【LeetCode】 388. Longest Absolute File Path
- Unity性能优化
- 全排列--非递归实现
- iOS中UIScrollView极限优化:两个UIImageView循环利用
- runtime动态添加方法引出的消息转发
- 图像特征提取三大法宝:HOG特征,LBP特征,Haar特征
- 388. Longest Absolute File Path
- 【Java】UML类图几种关系的总结
- Linux 五种 IO模型 性能分析
- Map四种方法的读写性能对比
- html5新增的标签
- 如何打造一款直播App(方法流程)
- CUDA Intro - Variable block.x and blockIdx.x
- 字典序的下一个排列
- win7 64下安装mysql-python报错的解决办法