题目：

题解：

func simplifyPath(path string) string {
    stack := []string{}
    for _, name := range strings.Split(path, "/") {
        if name == ".." {
            if len(stack) > 0 {
                stack = stack[:len(stack)-1]
            }
        } else if name != "" && name != "." {
            stack = append(stack, name)
        }
    }
    return "/" + strings.Join(stack, "/")
}