1598. Crawler Log Folder
Easy
10 Points
Array
String
Stack
The Leetcode file system keeps a log each time some user performs a change folder operation.
The operations are described below:
You are given a list of strings logs where logs[i] is the operation performed by the user at the ith step.
The file system starts in the main folder, then the operations in logs are performed.
Return the minimum number of operations needed to go back to the main folder after the change folder operations.
Examples
Example 1
Input: logs = ["d1/","d2/","../","d21/","./"]
Output: 2
Explanation: Use this change folder operation "../" 2 times and go back to the main folder.
Example 2
Input: logs = ["d1/","d2/","./","d3/","../","d31/"]
Output: 3
Example 3
Input: logs = ["d1/","../","../","../"]
Output: 0
Constraints
1 <= logs.length <= 1032 <= logs[i].length <= 10logs[i] contains lowercase English letters, digits, '.', and '/'.logs[i] follows the format described in the statement.Folder names consist of lowercase English letters and digits.
1598. Crawler Log Folder
Easy
10 Points
Array
String
Stack
The Leetcode file system keeps a log each time some user performs a change folder operation.
The operations are described below:
You are given a list of strings logs where logs[i] is the operation performed by the user at the ith step.
The file system starts in the main folder, then the operations in logs are performed.
Return the minimum number of operations needed to go back to the main folder after the change folder operations.
Examples
Example 1
Input: logs = ["d1/","d2/","../","d21/","./"]
Output: 2
Explanation: Use this change folder operation "../" 2 times and go back to the main folder.
Example 2
Input: logs = ["d1/","d2/","./","d3/","../","d31/"]
Output: 3
Example 3
Input: logs = ["d1/","../","../","../"]
Output: 0
Constraints
1 <= logs.length <= 1032 <= logs[i].length <= 10logs[i] contains lowercase English letters, digits, '.', and '/'.logs[i] follows the format described in the statement.Folder names consist of lowercase English letters and digits.