feat(work): add solution for LeetCode 876 Middle of the Linked List

work/1/Easy/Linked List/876.middle-of-the-linked-list.py

@@ -0,0 +1,50 @@
+"""
+876. Middle of the Linked List
+Difficulty: Easy
+https://leetcode.com/problems/middle-of-the-linked-list/
+
+──────────────────────────────────────────────────
+
+Given the head of a singly linked list, return the middle node of the
+linked list.
+
+If there are two middle nodes, return the second middle node.
+
+
+
+Example 1:
+
+Input: head = [1,2,3,4,5]
+Output: [3,4,5]
+Explanation: The middle node of the list is node 3.
+
+Example 2:
+
+Input: head = [1,2,3,4,5,6]
+Output: [4,5,6]
+Explanation: Since the list has two middle nodes with values 3 and 4,
+we return the second one.
+
+
+
+Constraints:
+
+        • The number of nodes in the list is in the range [1, 100].
+
+        • 1 <= Node.val <= 100
+"""
+
+
+# Definition for singly-linked list.
+# class ListNode:
+#     def __init__(self, val=0, next=None):
+#         self.val = val
+#         self.next = next
+class Solution:
+    def middleNode(self, head: ListNode | None) -> ListNode | None:
+        slow = fast = head
+        while fast and fast.next:
+            fast = fast.next.next
+            slow = slow.next
+
+        return slow