import pyutil as pyu
pyu.get_local_pyinfo()

print(pyu.ps2("python-dotenv"))

from typing import List

class Solution:
  def copyRandomList(self, head: 'Node') -> 'Node':
    if not head:
      return None
    if head in self.map:
      return self.map[head]

    newNode = Node(head.val)
    self.map[head] = newNode
    newNode.next = self.copyRandomList(head.next)
    newNode.random = self.copyRandomList(head.random)
    return newNode

  map = {}

new Solution().copyRandomList()