From 4cdb854691e596158e9eb67c508fe1797293c151 Mon Sep 17 00:00:00 2001 From: Deven <63876261+devenperez@users.noreply.github.com> Date: Mon, 9 Jan 2023 18:33:48 -0500 Subject: [PATCH] Create README - LeetHub --- 144-binary-tree-preorder-traversal/README.md | 32 ++++++++++++++++++++ 1 file changed, 32 insertions(+) create mode 100644 144-binary-tree-preorder-traversal/README.md diff --git a/144-binary-tree-preorder-traversal/README.md b/144-binary-tree-preorder-traversal/README.md new file mode 100644 index 0000000..320ded4 --- /dev/null +++ b/144-binary-tree-preorder-traversal/README.md @@ -0,0 +1,32 @@ +

144. Binary Tree Preorder Traversal

Easy


Given the root of a binary tree, return the preorder traversal of its nodes' values.

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Example 1:

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Input: root = [1,null,2,3]
+Output: [1,2,3]
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Example 2:

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Input: root = []
+Output: []
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Example 3:

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Input: root = [1]
+Output: [1]
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Constraints:

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Follow up: Recursive solution is trivial, could you do it iteratively?

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