Archives | Di's Blog

2022

06

03

LC 450 & LC 669

Solution to LeetCode 450 Delete Node is a BST, and LeetCode 669 Trim a Binary Search Tree. A binary search tree is a tr

2022-06-03 BST

Recursion

02

LC 501 & LC 530 & LC 701

LeetCode 501 Find Mode in Binary Search Tree, LeetCode 530 Minimum Absolute Difference in BST, and LeetCode 701 Insert i

2022-06-02 BST

Stack Recursion

01

LC 700 & LC 98 & LC 235

LeetCode 700 Search in a Binary Search Tree, LeetCode 98 Validate Binary Search Tree, and LeetCode 235 west Common Ances

2022-06-01 BST

Stack Recursion DFS BFS

05

31

LC 617 & LC 236

Solution to LeetCode 617 Merge Two Binary Trees, and LeetCode 236 Lowest Common Ancestor of a Binary Tree. LeetCode 617

2022-05-31 Binary Tree

Recursion Queue

30

LC 105 & LC 106 & LC 654

Solution to LeetCode 105 Construct Binary Tree from Preorder and Inorder Traversal, LeetCode 106 Construct Binary Tree f

2022-05-30 Binary Tree

Stack Recursion Queue DFS BFS

29

LC 112 & LC 113

Solution to LeetCode 112 Path Sum and LeetCode 113 Path Sum II. LeetCode 112Path Sum (Easy) [link] 1] Recursive solution

2022-05-29 Binary Tree

Stack Recursion Queue DFS BFS

28

LC 404 & LC 513

Solution to LeetCode 404 Sum of Left Leaves and LeetCode 513 Find Bottom Left Tree Value. LeetCode 404Sum of Left Leaves

2022-05-28 Binary Tree

Stack Recursion Queue DFS BFS

27

LC 222 & LC 110 & LC 257

Solution to LeetCode 222 Count Complete Tree Nodes, LeetCode 110 Balanced Binary Tree, and LeetCode 257 Binary Tree Path

2022-05-27 Binary Tree

Stack Recursion Queue DFS BFS

26

LC 100 & LC 101 & LC 572

Solution to LeetCode 100 Same Tree, LeetCode 101 Symmetric Tree, and LeetCode 572 Subtree of Another Tree. LeetCode 100S

2022-05-26 Binary Tree

Stack Recursion Queue DFS BFS

25

LC 226 & LC 106

Solution to LeetCode 226 Invert Binary Tree and LeetCode 106 Construct Binary Tree from Inorder and Postorder Traversal.

2022-05-25 Binary Tree

Recursion Queue

24

LC 104 & LC 111 & LC 559

Solution to LeetCode 104 Maximum Depth of Binary Tree, LeetCode 111 Minimum Depth of Binary Tree, and LeetCode 559 Maxim

2022-05-24 Binary Tree

Queue DFS BFS

23

LC 116 & LC 117

Solution to LeetCode 116 Populating Next Right Pointers in Each Node and LeetCode 117 Populating Next Right Pointers in

2022-05-23 Binary Tree

Queue BFS