Closed labuladong closed 2 years ago
104: https://leetcode.com/problems/maximum-depth-of-binary-tree/discuss/2319750/Simple-java-recursion-solutions. 543: https://leetcode.com/problems/diameter-of-binary-tree/discuss/2319802/Simple-recursion-java-solution 144: https://leetcode.com/problems/binary-tree-preorder-traversal/discuss/2319818/Simple-iterative-pre-order-travseral-in-java
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