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快慢指针,快的一次走两个节点,慢的一次走一个节点. 当快指针走完后,慢指针指向的是中间节点
/** * @param {ListNode} head * @return {ListNode} */ var middleNode = function(head) { let fast = slow = head; while(fast && fast.next){ fast = fast.next.next; slow = slow.next; } return slow; };
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The text was updated successfully, but these errors were encountered: