willww64

#!/usr/bin/env python

# 反转一个单链表。示例:
# 输入: 1 --> 2 --> 3 --> 4 --> 5 --> None
# 输出: 5 --> 4 --> 3 --> 2 --> 1 --> None

from typing import Any, List, Optional

ListNode = Optional["Node"]

willww64

def isAuthenticated(User u) {
  try {
    return u.impersonate().isAuthenticated()
  }
  // Users pulled from SCM history e.a. are not GUI users
  catch (org.acegisecurity.userdetails.UsernameNotFoundException xc) {
    return false
  }
}