94. Binary Tree Inorder Traversal
94. Binary Tree Inorder Traversal
# Definition for a binary tree
Tree
1373. Maximum Sum BST in Binary Tree
1371. Maximum Sum BST in Binary Tree
# Definition for a
222. Count Complete Tree Nodes
222. Count Complete Tree Nodes
線性搜索
# Definition for a binary
559. Maximum Depth of N-ary Tree
559. Maximum Depth of N-ary Tree
"""
# Definition
437. Path Sum III
437. Path Sum III
更難的樹的遍歷加上回溯法。
# Definition for a binary tree
590. N-ary Tree Postorder Traversal
590. N-ary Tree Postorder Traversal
"""
# Definition for
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
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。
226. Invert Binary Tree
226. Invert Binary Tree
# Definition for a binary tree node.