Comments (1)
PegasusWang
commented on May 27, 2024
对于单链表或者双链表，这里如果需要查找节点的话删除的复杂度都是 O(n)的，因为你只能从头到尾顺序查找。但是对于双链表，如果已经知道了一个节点的情况下，你就可以直接通过连接该节点前后节点的方式使用O(1)的方式删除该节点了。在 lru_cache里，你要删除一个节点的时候是知道这个节点值的，所以可以直接用O(1)的时间删除，并不需要从头到位查找这个节点。
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