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71. Simplify Path压缩文件的绝对路径

时间:2018-05-08 23:01:35      阅读:166      评论:0      收藏:0      [点我收藏+]

标签:example   压缩   程序   get   color   思想   pre   root   style   

[抄题]:

Given an absolute path for a file (Unix-style), simplify it.

For example,
path = "/home/", => "/home"
path = "/a/./b/../../c/", => "/c"

 [暴力解法]:

时间分析:

空间分析:

 [优化后]:

时间分析:

空间分析:

[奇葩输出条件]:

[奇葩corner case]:

Corner Cases:

    • Did you consider the case where path = "/../"?
      In this case, you should return "/".
    • Another corner case is the path might contain multiple slashes ‘/‘ together, such as "/home//foo/".
      In this case, you should ignore redundant slashes and return "/home/foo".

[思维问题]:

[一句话思路]:

[输入量]:空: 正常情况:特大:特小:程序里处理到的特殊情况:异常情况(不合法不合理的输入):

[画图]:

[一刷]:

[二刷]:

[三刷]:

[四刷]:

[五刷]:

  [五分钟肉眼debug的结果]:

[总结]:

[复杂度]:Time complexity: O() Space complexity: O()

[英文数据结构或算法,为什么不用别的数据结构或算法]:

从左往右走:

"/b/c/" - directory ‘b ‘ - > directory ‘c ‘
"." - current directory
"./" - current directory
"../" - one directory up
e.g
"/" : root directory
"b/c/../" : it will go from c to b
"c/b/./" : it is still in directory b

[算法思想:递归/分治/贪心]:

[关键模板化代码]:

[其他解法]:

[Follow Up]:

[LC给出的题目变变变]:

 [代码风格] :

71. Simplify Path压缩文件的绝对路径

标签:example   压缩   程序   get   color   思想   pre   root   style   

原文地址:https://www.cnblogs.com/immiao0319/p/9011516.html

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