Improved python

Author: javadev

src/main/python/g0001_0100/s0001_two_sum/Solution.py renamed to src/main/python/g0001_0100/s0001_two_sum/Solution0001.py

@@ -3,6 +3,13 @@
 # #Top_Interview_150_Linked_List #Big_O_Time_O(max(N,M))_Space_O(max(N,M))
 # #AI_can_be_used_to_solve_the_task #2025_07_22_Time_0_ms_(100.00%)_Space_17.84_MB_(56.69%)
 
+from typing import Optional
+
+class ListNode:
+    def __init__(self, val=0, next=None):
+        self.val = val
+        self.next = next
+
 # Definition for singly-linked list.
 # class ListNode:
 #     def __init__(self, val=0, next=None):