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+# LeetCode 讀書會第 34 次聚會 2021/11/30
+
+## leetcode 讀書會通知
+
+1. 項目: 第 34 次聚會
+2. 目的: 線上一起寫題目, 由有想法的人帶領, 先解題, 再看該題有趣的解法
+3. 時間: 11/30 (二) 20:00 ~ 21:00
+4. 地點: google meet 線上 (前 10 分鐘預備鏈接)
+5. 解題項目:  [Binary Tree](https://leetcode.com/explore/learn/card/data-structure-tree/)
+6. 共筆: GitHub https://github.com/programmingbookclub/Leetcode-club
+7. 備註: 
+
+上次因為固定會說話的朋友沒有參加，我自己不習慣一直講話，導致我自己覺得尷尬，希望這次會好一點（我是說有其他人講話的部分）
+
+
+* 	EASY	112	Path Sum	https://leetcode.com/problems/path-sum
+* 	MEDIUM	106	Construct Binary Tree from Inorder and Postorder Traversal	https://leetcode.com/problems/construct-binary-tree-from-inorder-and-postorder-traversal
+* 	MEDIUM	105	Construct Binary Tree from Preorder and Inorder Traversal	https://leetcode.com/problems/construct-binary-tree-from-preorder-and-inorder-traversal
+* 	MEDIUM	116	Populating Next Right Pointers in Each Node	https://leetcode.com/problems/populating-next-right-pointers-in-each-node
+* 	MEDIUM	117	Populating Next Right Pointers in Each Node II	https://leetcode.com/problems/populating-next-right-pointers-in-each-node-ii
+* 	MEDIUM	236	Lowest Common Ancestor of a Binary Tree	https://leetcode.com/problems/lowest-common-ancestor-of-a-binary-tree
+* 	HARD	297	Serialize and Deserialize Binary Tree	https://leetcode.com/problems/serialize-and-deserialize-binary-tree
+
+--- 
+Notes: