第一步,在每个节点的后面插入复制的节点。
第二步,对复制节点的 random 链接进行赋值。
第三步,拆分。
public RandomListNode Clone(RandomListNode pHead) { if (pHead == null) { return null; } // 插入新节点 RandomListNode cur = pHead; while (cur != null) { RandomListNode clone = new RandomListNode(cur.label); clone.next = cur.next; cur.next = clone; cur = clone.next; } // 建立 random 链接 cur = pHead; while (cur != null) { RandomListNode clone = cur.next; if (cur.random != null) { clone.random = cur.random.next; } cur = clone.next; } // 拆分 cur = pHead; RandomListNode pCloneHead = pHead.next; while (cur.next != null) { RandomListNode next = cur.next; cur.next = next.next; cur = next; } return pCloneHead; }