diff --git a/Week_01/id_19/24.py b/Week_01/id_19/24.py
new file mode 100644
index 00000000..ccac0597
--- /dev/null
+++ b/Week_01/id_19/24.py
@@ -0,0 +1,11 @@
+    
+class Solution:
+    def swapPairs(self, head):
+        dummy = pre = ListNode(0)
+        pre.next = head
+        while pre.next and pre.next.next:
+            a = pre.next
+            b = a.next
+            pre.next, a.next, b.next = b, b.next, a
+            pre = a
+        return dummy.next