Update 2074.Reverse-Nodes-in-Even-Length-Groups.cpp

wisdompeak · web-flow · commit 3cc2899c60dc · 2021-11-14T18:09:02.000-08:00
diff --git a/Linked_List/2074.Reverse-Nodes-in-Even-Length-Groups/2074.Reverse-Nodes-in-Even-Length-Groups.cpp b/Linked_List/2074.Reverse-Nodes-in-Even-Length-Groups/2074.Reverse-Nodes-in-Even-Length-Groups.cpp
@@ -57,14 +57,15 @@ class Solution {
 
     ListNode* reverseLinkedList(ListNode* head)
     {
-        ListNode* h = head;
+        ListNode* cur = head;
         ListNode* last = NULL;
-        while (h!=NULL)
+        ListNode* next = NULL;
+        while (cur!=NULL)
         {
-            ListNode* nxt = h->next;
-            h->next = last;
-            last = h;
-            h = nxt;
+            next = cur->next;
+            cur->next = last;
+            last = cur;
+            cur = next;
         }
         return last;
     }

Original file line number	Diff line number	Diff line change
`@@ -57,14 +57,15 @@ class Solution {`
`57`	`57`
`58`	`58`	`ListNode* reverseLinkedList(ListNode* head)`
`59`	`59`	`{`
`60`		`- ListNode* h = head;`
	`60`	`+ ListNode* cur = head;`
`61`	`61`	`ListNode* last = NULL;`
`62`		`- while (h!=NULL)`
	`62`	`+ ListNode* next = NULL;`
	`63`	`+ while (cur!=NULL)`
`63`	`64`	`{`
`64`		`- ListNode* nxt = h->next;`
`65`		`- h->next = last;`
`66`		`- last = h;`
`67`		`- h = nxt;`
	`65`	`+ next = cur->next;`
	`66`	`+ cur->next = last;`
	`67`	`+ last = cur;`
	`68`	`+ cur = next;`
`68`	`69`	`}`
`69`	`70`	`return last;`
`70`	`71`	`}`