Create 9 September Assign Mice Holes (#880)

Author: Chayandas07

9 September Assign Mice Holes

@@ -0,0 +1,51 @@
+class Solution {
+public:
+    // Function to merge two sorted linked lists
+    Node* merge(Node* left, Node* right) {
+        if (!left) return right;
+        if (!right) return left;
+
+        Node* result = nullptr;
+
+        if (left->data <= right->data) {
+            result = left;
+            result->next = merge(left->next, right);
+        } else {
+            result = right;
+            result->next = merge(left, right->next);
+        }
+        return result;
+    }
+
+    // Function to find the middle of the linked list
+    Node* getMiddle(Node* head) {
+        if (!head) return head;
+        
+        Node* slow = head;
+        Node* fast = head->next;
+
+        while (fast && fast->next) {
+            slow = slow->next;
+            fast = fast->next->next;
+        }
+
+        return slow;
+    }
+
+    // Main function to implement merge sort
+    Node* mergeSort(Node* head) {
+        if (!head || !head->next) return head;
+
+        // Find the middle of the linked list
+        Node* middle = getMiddle(head);
+        Node* nextOfMiddle = middle->next;
+        middle->next = nullptr; // Split into two halves
+
+        // Recursively sort both halves
+        Node* left = mergeSort(head);
+        Node* right = mergeSort(nextOfMiddle);
+
+        // Merge the two sorted halves
+        return merge(left, right);
+    }
+};