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20201230, Tree
20201230
- [x] 94. Binary Tree Inorder Traversal recursion + iteration, morris
- [x] 144. Binary Tree Preorder Traversal : recursion + iteration, morris
- [x] 145. Binary Tree Postorder Traversal recursion + iteration
20210102, #Traversal
- [x] 94. Binary Tree Inorder Traversal recursion + iteration, morris
- [x] 144. Binary Tree Preorder Traversal recursion + iteration, morris
- [x] 145. Binary Tree Postorder Traversal recursion + iteration
- [x] 589. N-ary Tree Preorder Traversal 1.注意 iterative 的写法,基于 Stack 实现; 2.recursion
- [x] 590. N-ary Tree Postorder Traversal 1.注意 iterative 的写法,基于 Stack 实现; 2.recursion
- [x] 314. Binary Tree Vertical Order Traversal Pair; Two Queue
- [x] 102. Binary Tree Level Order Traversal BFS; recursion
- [x] 107. Binary Tree Level Order Traversal II LinkedList.addFirst(); Collections.reverse()
- [x] 103. Binary Tree Zigzag Level Order Traversal
- [x] 429. N-ary Tree Level Order Traversal BFS; Recursion
20210107