Problems

✅ LeetCode Solutions! Continuously updating!

Algorithms

No.	Title	Difficulty	Topics
145	Binary Tree Postorder Traversal	Easy	Stack, Tree, Depth-First Search, Binary Tree
144	Binary Tree Preorder Traversal	Easy	Stack, Tree, Depth-First Search, Binary Tree
102	Binary Tree Level Order Traversal	Medium	Tree, Depth-First Search, Binary Tree
94	Binary Tree Inorder Traversal	Easy	Stack, Tree, Depth-First Search, Binary Tree
83	Remove Duplicates from Sorted List	Easy	Linked List
66	Plus One	Easy	Array, Math
26	Remove Duplicates from Sorted Array	Easy	Array, Two Pointers
24	Swap Nodes in Pairs	Medium	Linked List, Stack
20	Valid Parentheses	Easy	String, Stack
7	Reverse Integer	Medium	Math
3	Longest Substring Without Repeating Characters	Medium	Hash Table, String, Sliding Window
2	Add Two Numbers	Medium	Linked List, Math, Recursion
1	Two Sum	Easy	Array, Hash Table