Weird copying linked list-ish thing with random

leetcode/stdlib.py

@@ -1,3 +1,4 @@
+import dataclasses
 import typing
 
 
@@ -14,6 +15,30 @@ class ListNode:
         self.next = next
 
 
+class ListNodeRandom:
+    """ListNodeRandom is another weirdo linked list thing from
+    leetcode that is obviously very different than a binary tree
+    node :upside_down_face:
+    """
+
+    def __init__(
+        self,
+        x: int,
+        next: typing.Optional["ListNodeRandom"] = None,
+        random: typing.Optional["ListNodeRandom"] = None,
+    ):
+        self.val = x
+        self.next = next
+        self.random = random
+
+
+@dataclasses.dataclass
+class ListNodeRandomNicely:
+    val: int
+    next: typing.Optional["ListNodeRandomNicely"] = None
+    random: typing.Optional["ListNodeRandomNicely"] = None
+
+
 class BinaryTreeNode(typing.Protocol):
     val: int
     left: typing.Optional["BinaryTreeNode"]