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+#!/usr/bin/env python%0D%0A#coding: utf-8%0D%0A%0D%0A%22%22%22%0D%0ALeetCode: https://leetcode.com/problems/copy-list-with-random-pointer/%0D%0A%0D%0AA linked list is given such that each node contains an additional random pointer which could point to any node in the list or null.%0D%0A%0D%0AReturn a deep copy of the list.%0D%0A%22%22%22%0D%0A%0D%0A# Definition for singly-linked list with a random pointer.%0D%0A# class RandomListNode(object):%0D%0A#     def __init__(self, x):%0D%0A#         self.label = x%0D%0A#         self.next = None%0D%0A#         self.random = None%0D%0A%0D%0Aclass Solution(object):%0D%0A    def copyRandomList(self, head):%0D%0A        %22%22%22%0D%0A        :type head: RandomListNode%0D%0A        :rtype: RandomListNode%0D%0A        %22%22%22

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