222. Count Complete Tree Nodes
222. Count Complete Tree Nodes
線性搜索
# Definition for a binary
Tree
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
230. Kth Smallest Element in a BST
230. Kth Smallest Element in a BST
題目求，如何在一個平衡二元樹中找出第 k
1971. Find if Path Exists in Graph
1971. Find if Path Exists in Graph
這個題目有兩個地方要注意，圖形的任兩個節點之間是雙向的，接著就是要選擇要使用深度優先還是廣度優先的搜索。
430. Flatten a Multilevel Doubly Linked List
430. Flatten a Multilevel Doubly Linked List
"""