Leetcode
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Array 7 Search 16 Stack 4 Linked List 9 String 8 Queue 3 HashTable 10 Dynamic Programming 32 Recursion 12 Divide and Conquer 3 Graph 7 Greedy 2 Math 4 Sort 2 SQL 38 Double Pointers 2 Binary Tree 12 BST 4 Brain Teaser 3 Summary 13 Customized Sort 1 Heap 1 Skill Set 16 Others 1 Simulation 1 Python 1 Monotonic Stack 1
LC 617 & LC 236 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
LC 105 & LC 106 & LC 654 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
LC 112 & LC 113 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
LC 404 & LC 513 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
LC 222 & LC 110 & LC 257 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
LC 100 & LC 101 & LC 572 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
LC 226 & LC 106 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
LC 104 & LC 111 & LC 559 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
LC 116 & LC 117 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
LC 637 & LC 429 & LC 515 LC 637 & LC 429 & LC 515
Solution to LeetCode 637 Average of Levels in Binary Tree, LeetCode 429 N-ary Tree Level Order Traversal, and LeetCode 5
2022-05-22 Binary Tree
Queue BFS
LC 102 & LC 107 & LC 199 LC 102 & LC 107 & LC 199
Solution to LeetCode 102 Binary Tree Level Order Traversal, LeetCode 107 Binary Tree Level Order Traversal II, and LeetC
2022-05-21 Binary Tree
Queue BFS
LC 94 & LC 144 & LC 145 & LC 102 (with template) LC 94 & LC 144 & LC 145 & LC 102 (with template)
Solution to LeetCode 94 Binary Tree Inorder Traversal, LeetCode 144 Binary Tree Preorder Traversal, LeetCode 145 Binary
2022-05-20 Binary Tree
Stack Template Recursive