47.YA

class Solution:
    def simplifyPath(self, path: str) -> str:
        deslashed = path.split('/')
        stack = []

        for s in deslashed:
            if s == '.':
                continue
            elif s == '..':
                if len(stack) > 0:
                    stack.pop()
            elif s != '':
                stack.append(s)

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