Tree

106. Construct Binary Tree from Inorder and Postorder Traversal

106. Construct Binary Tree from Inorder and Postorder Traversal postorder

261. Graph Valid Tree

261. Graph Valid Tree 題目給定一個數字 n 和一個陣列，n 代表的是一個圖中，所用有的節點數量，

222. Count Complete Tree Nodes

222. Count Complete Tree Nodes 線性搜索 # Definition for a binary

94. Binary Tree Inorder Traversal

94. Binary Tree Inorder Traversal # Definition for a binary tree

1373. Maximum Sum BST in Binary Tree

1371. Maximum Sum BST in Binary Tree # Definition for a

559. Maximum Depth of N-ary Tree

559. Maximum Depth of N-ary Tree """ # Definition

144. Binary Tree Preorder Traversal

144. Binary Tree Preorder Traversal # Definition for a binary tree

297. Serialize and Deserialize Binary Tree

297. Serialize and Deserialize Binary Tree 這一題可以透過 536. Construct Binary

590. N-ary Tree Postorder Traversal

590. N-ary Tree Postorder Traversal """ # Definition for

98. Validate Binary Search Tree

98. Validate Binary Search Tree 一開始的根節點，其值可以為任意數值，因為根節點並沒有任何的限制 但是從此開始，左邊的子樹，