leetcode 203. Remove Linked List Elements-移除連結串列元素
【思路】
思路很簡單,遍歷連結串列,如果節點的值等於 val,那麼就將節點移除。這裡新增加一個節點,是為了防止頭結點和 val 相等時無法移除的情況:
63 / 63 test cases passed. Runtime: 2 ms Your runtime beats 3.79% of javasubmissions.public ListNode removeElements(ListNode head, int val) { ListNode dummyHead = new ListNode(0), p = dummyHead; dummyHead.next = head; while (p.next != null) if (p.next.val == val) p.next = p.next.next; else p = p.next; return dummyHead.next; }
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