Merge pull request youngyangyang04#1138 from Aaron-Lin-74/patch-2

Update 0203.移除链表元素.md
zhoupeng99 · Mar 23, 2022 · 9139ffb · 9139ffb
2 parents 5a7ab02 + 09c1bd8
commit 9139ffb
Showing 1 changed file with 3 additions and 3 deletions.
diff --git a/problems/0203.移除链表元素.md b/problems/0203.移除链表元素.md
@@ -342,14 +342,14 @@ function removeElements(head: ListNode | null, val: number): ListNode | null {
 
 ```typescript
 function removeElements(head: ListNode | null, val: number): ListNode | null {
-    head = new ListNode(0, head);
-    let pre: ListNode = head, cur: ListNode = head.next;
+    let dummyHead = new ListNode(0, head);
+    let pre: ListNode = dummyHead, cur: ListNode | null = dummyHead.next;
     // 删除非头部节点
     while (cur) {
         if (cur.val === val) {
             pre.next = cur.next;
         } else {
-            pre = pre.next;
+            pre = cur;
         }
         cur = cur.next;
     }