1
class Solution:
2
    def simplifyPath(self, path: str) -> str:
3
        stack = []
4

5
        i = 0
6
        while i < len(path):
7
            if path[i] == "/":
8
                i += 1
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                continue
10

11
            else:
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                cur = ""
13
                while i < len(path) and path[i] != "/":
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                    cur += path[i]
15
                    i += 1
16

17
                if cur == "..":
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                    if stack:
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                        stack.pop()
20
                elif cur == "." or cur == "":
21
                    i += 1
22
                    continue
23
                else:
24
                    stack.append(cur)
25

26
    return "/" + "/".join(stack)