Merge pull request #2299 from yeonjukim164/main

[yeonjukim164] WEEK 11 solutions

Author: TonyKim9401

merge-two-sorted-lists/yeonjukim164.java

@@ -0,0 +1,25 @@
+class Solution {
+    public ListNode mergeTwoLists(ListNode list1, ListNode list2) {
+        ListNode dummy = new ListNode(-1);
+        ListNode curr = dummy;
+
+        while (list1 != null && list2 != null) {
+            if (list1.val <= list2.val) {
+                curr.next = list1;
+                list1 = list1.next;
+            } else {
+                curr.next = list2;
+                list2 = list2.next;
+            }
+            curr = curr.next;
+        }
+
+        if (list1 != null) {
+            curr.next = list1;
+        } else if (list2 != null) {
+            curr.next = list2;
+        }
+
+        return dummy.next;
+    }
+}