Tag: Depth-first Search • Algorithm Solutions

Posted on 2020, Dec 03
17. Letter Combinations of a Phone Number
Posted on 2020, Nov 16
98. Validate Binary Search Tree
Posted on 2023, Apr 05
99. Recover Binary Search Tree
Posted on 2020, Nov 16
100. Same Tree
Posted on 2020, Nov 16
101. Symmetric Tree
Posted on 2020, Nov 17
104. Maximum Depth of Binary Tree
Posted on 2020, Nov 17
105. Construct Binary Tree from Preorder and Inorder Traversal
Posted on 2020, Nov 18
106. Construct Binary Tree from Inorder and Postorder Traversal
Posted on 2020, Nov 18
108. Convert Sorted Array to Binary Search Tree
Posted on 2021, Apr 20
109. Convert Sorted List to Binary Search Tree
Posted on 2020, Nov 18
110. Balanced Binary Tree
Posted on 2020, Nov 18
111. Minimum Depth of Binary Tree
Posted on 2020, Nov 18
112. Path Sum
Posted on 2020, Nov 18
113. Path Sum II
Posted on 2020, Nov 18
114. Flatten Binary Tree to Linked List
Posted on 2020, Nov 19
116. Populating Next Right Pointers in Each Node
Posted on 2023, Mar 16
117. Populating Next Right Pointers in Each Node II
Posted on 2023, Mar 16
124. Binary Tree Maximum Path Sum
Posted on 2020, Nov 18
129. Sum Root to Leaf Numbers
Posted on 2024, Apr 16
130. Surrounded Regions
Posted on 2020, Nov 18
199. Binary Tree Right Side View
Posted on 2023, Aug 25
200. Number of Islands
Posted on 2020, Dec 05
211. Design Add and Search Words Data Structure
Posted on 2023, Jan 05
222. Count Complete Tree Nodes
Posted on 2023, Apr 09
230. Kth Smallest Element in a BST
Posted on 2023, Mar 19
236. Lowest Common Ancestor of a Binary Tree
Posted on 2020, Nov 19
257. Binary Tree Paths
Posted on 2023, Apr 08
337. House Robber III
Posted on 2021, Mar 23
341. Flatten Nested List Iterator
Posted on 2020, Dec 05
419. Battleships in a Board
Posted on 2021, May 21
430. Flatten a Multilevel Doubly Linked List
Posted on 2023, Apr 11
449. Serialize and Deserialize BST
Posted on 2023, Jan 27
472. Concatenated Words
Posted on 2023, Feb 08
501. Find Mode in Binary Search Tree
Posted on 2020, Nov 19
513. Find Bottom Left Tree Value
Posted on 2020, Nov 20
515. Find Largest Value in Each Tree Row
Posted on 2023, Mar 09
543. Diameter of Binary Tree
Posted on 2020, Dec 05
547. Number of Provinces
Posted on 2023, Jan 27
559. Maximum Depth of N-ary Tree
Posted on 2023, Mar 20
563. Binary Tree Tilt
Posted on 2023, Mar 09
589. N-ary Tree Preorder Traversal
Posted on 2023, Mar 17
623. Add One Row to Tree
Posted on 2023, Apr 25
652. Find Duplicate Subtrees
Posted on 2023, Mar 18
655. Print Binary Tree
Posted on 2020, Dec 01
690. Employee Importance
Posted on 2020, Dec 05
695. Max Area of Island
Posted on 2020, Dec 05
733. Flood Fill
Posted on 2021, Apr 13
783. Minimum Distance Between BST Nodes
Posted on 2023, Jan 26
787. Cheapest Flights Within K Stops
Posted on 2023, Mar 21
814. Binary Tree Pruning
Posted on 2020, Dec 05
841. Keys and Rooms
Posted on 2023, May 24
863. All Nodes Distance K in Binary Tree
Posted on 2023, Jun 09
865. Smallest Subtree with all the Deepest Nodes
Posted on 2023, Mar 15
872. Leaf-Similar Trees
Posted on 2023, Mar 28
897. Increasing Order Search Tree
Posted on 2023, Mar 14
938. Range Sum of BST
Posted on 2023, Jun 10
951. Flip Equivalent Binary Trees
Posted on 2023, Mar 12
965. Univalued Binary Tree
Posted on 2023, Jun 12
968. Binary Tree Cameras
Posted on 2023, Apr 12
971. Flip Binary Tree To Match Preorder Traversal
Posted on 2023, May 02
979. Distribute Coins in Binary Tree
Posted on 2023, Apr 13
987. Vertical Order Traversal of a Binary Tree
Posted on 2023, Mar 21
988. Smallest String Starting From Leaf
Posted on 2023, Mar 12
993. Cousins in Binary Tree