[Daily Coding Problem 365] Implement Quack using 3 stacks
A quack is a data structure combining properties of both stacks and queues. It can be viewed as a li ...
原文：[Daily Coding Problem 24] Implement locking in a binary tree.
This problem was asked by Google. Implement locking in a binary tree. A binary tree node can be locked or unlocked only if all of its descendants or ancestors are not locked. Design a binary tree node ...
2018-12-22 02:35 0 823 推荐指数：
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