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Oct 2021
94 Binary Tree Inorder Traversal
Dec 2022
95 Unique Binary Search Trees II
Sep 2022
98 Validate Binary Search Tree
Aug 2022
99 Recover Binary Search Tree
Jun 2021
100 Same Tree
Mar 2021
101 Symmetric Tree
Oct 2021
102 Binary Tree Level Order Traversal
Mar 2021
103 Binary Tree Zigzag Level Order Traversal
Oct 2021
104 Maximum Depth of Binary Tree
Sep 2022
105 Construct Binary Tree from Preorder and Inorder Traversal
Jan 2023
106 Construct Binary Tree from Inorder and Postorder Traversal
Mar 2021
109 Convert Sorted List to Binary Search Tree
Oct 2021
112 Path Sum
Mar 2021
113 Path Sum II
Jan 2023
114 Flatten Binary Tree to Linked List
Sep 2022
117 Populating Next Right Pointers in Each Node II
Sep 2022
124 Binary Tree Maximum Path Sum
Dec 2022
129 Sum Root to Leaf Numbers
Oct 2021
144 Binary Tree Preorder Traversal
Oct 2021
145 Binary Tree Postorder Traversal
Jan 2023
156 Binary Tree Upside Down
Sep 2022
199 Binary Tree Right Side View
Jan 2023
222 Count Complete Tree Nodes
Oct 2021
226 Invert Binary Tree
Oct 2021
235 Lowest Common Ancestor of a Binary Search Tree
Aug 2022
236 Lowest Common Ancestor of a Binary Tree
Jan 2023
250 Count Univalue Subtrees
Jan 2023
255 Verify Preorder Sequence in Binary Search Tree
Sep 2022
314 Binary Tree Vertical Order Traversal
Sep 2022
331 Verify Preorder Serialization of a Binary Tree
Sep 2022
333 Largest BST Subtree
Sep 2022
366 Find Leaves of Binary Tree
Nov 2022
428 Serialize and Deserialize N-ary Tree
Sep 2022
538 Convert BST to Greater Tree
Aug 2022
543 Diameter of Binary Tree
Sep 2022
545 Boundary of Binary Tree
Sep 2021
617 Merge Two Binary Trees
Oct 2021
700 Search in a Binary Search Tree
Oct 2021
701 Insert into a Binary Search Tree
Aug 2022
863 All Nodes Distance K in Binary Tree
Sep 2022
968 Binary Tree Cameras
Sep 2022
987 Vertical Order Traversal of a Binary Tree
Sep 2022
993 Cousins in Binary Tree
Mar 2021
1022 Sum of Root To Leaf Binary Numbers
Sep 2022
1038 Binary Search Tree to Greater Sum Tree
Feb 2023
1110 Delete Nodes And Return Forest
Oct 2022
1245 Tree Diameter
Mar 2021
1325 Delete Leaves With a Given Value
Sep 2022
1339 Maximum Product of Splitted Binary Tree
Nov 2022
1506 Find Root of N-Ary Tree
Sep 2022
1597 Build Binary Expression Tree From Infix Expression
Sep 2022
1628 Design an Expression Tree With Evaluate Function
Oct 2022
2096 Step-By-Step Directions From a Binary Tree Node to Another
Jan 2023
2458 Height of Binary Tree After Subtree Removal Queries