update: 24-2

hijiangtao · hijiangtao · commit 744b754e6cce · 2022-06-28T11:35:10.000+08:00
diff --git a/src/swap-nodes-in-pairs/res.ts b/src/swap-nodes-in-pairs/res.ts
@@ -37,4 +37,15 @@ function swapPairs(head: ListNode | null): ListNode | null {
     }
 
     return result;
-};
+};
+
+function swapPairs2(head: ListNode | null): ListNode | null {
+    if (!head?.next) {
+        return head;
+    }
+
+    const result = head.next;
+    head.next = swapPairs(result.next);
+    result.next = head;
+    return result;
+}
