栈,将 s 根据 "/" 分割, 遇到 "" 或 "." 不入栈, 遇到 ".." 且栈有值的情况下,栈顶出栈
#
# 代码中的类名、方法名、参数名已经指定,请勿修改,直接返回方法规定的值即可
#
#
# @param path string字符串
# @return string字符串
#
class Solution:
def simplifyPath(self , path: str) -> str:
# write code here
stack = []
for p in path.split("/"):
if p == "" or p == ".":
continue
if p == "..":
if stack:
stack.pop()
else:
stack.append(p)
return "/" + "/".join(stack)