Structure	Name	Difficulty	Url	Solved?
Array	Two Sum	Easy	URL	☑️
Array	Best Time to Buy and Sell Stock	Easy	URL	☑️
Array	Contains Duplicate	Easy	URL	☑️
Array	Product of Array Except Self	Easy	URL	☑️
Array	Maximum Subarray	Easy	URL	☑️
Array	Maximum Product Subarray	Medium	URL	☑️
Array	Find Minimum in Rotated Sorted Array	Medium	URL	☑️
Array	Search in Rotated Sorted Array	Medium	URL	☑️
Array	3Sum	Medium	URL	☑️
Array	Container With Most Water	Medium	URL	☑️
Binary	Sum of Two Integers	Easy	URL	🔲
Binary	Number of 1 Bits		URL	🔲
Binary	Counting Bits		URL	🔲
Binary	Missing Number		URL	🔲
Binary	Reverse Bits		URL	🔲
Dynamic Programming	Climbing Stairs	Easy	URL	☑️
Dynamic Programming	Coin Change	Medium	URL	☑️
Dynamic Programming	Longest Increasing Subsequence	Medium	URL	☑️
Dynamic Programming	Word Break Problem	Medium	URL	☑️
Dynamic Programming	Combination Sum	Medium	URL	☑️
Dynamic Programming	House Robber	Easy	URL	☑️
Dynamic Programming	House Robber II	Medium	URL	☑️
Dynamic Programming	Decode Ways	Medium	URL	☑️
Dynamic Programming	Unique Paths	Medium	URL	☑️
Dynamic Programming	Jump Game	Medium	URL	☑️
Graph	Clone Graph		URL	🔲
Graph	Course Schedule	Medium	URL	☑️
Graph	Pacific Atlantic Water Flow	Medium	URL	☑️
Graph	Number of Islands	Medium	URL	☑️
Graph	Longest Consecutive Sequence	Hard	URL	☑️
Graph	Alien Dictionary (Premium)		URL	🔲
Graph	Graph Valid Tree (Premium)		URL	🔲
Graph	Number of Connected Components in an Undirected Graph (Premium)		URL	🔲
Interval	Insert Interval		URL	🔲
Interval	Merge Intervals	Medium	URL	☑️
Interval	Non-overlapping Intervals		URL	🔲
Interval	Meeting Rooms (Premium)		URL	🔲
Interval	Meeting Rooms II (Premium)		URL	🔲
Linked List	Reverse a Linked List	Easy	URL	☑️
Linked List	Detect Cycle in a Linked List	Easy	URL	☑️
Linked List	Merge Two Sorted Lists	Easy	URL	☑️
Linked List	Merge K Sorted Lists (Duplicate)	Hard	URL	☑️
Linked List	Remove Nth Node From End Of List	Medium	URL	☑️
Linked List	Reorder List	Medium	URL	🔲
Matrix	Set Matrix Zeroes		URL	🔲
Matrix	Spiral Matrix		URL	🔲
Matrix	Rotate Image		URL	🔲
Matrix	Word Search		URL	🔲
String	Longest Substring Without Repeating Characters		URL	🔲
String	Longest Repeating Character Replacement		URL	🔲
String	Minimum Window Substring		URL	🔲
String	Valid Anagram		URL	🔲
String	Group Anagrams		URL	🔲
String	Valid Parentheses		URL	🔲
String	Valid Palindrome		URL	🔲
String	Longest Palindromic Substring		URL	🔲
String	Palindromic Substrings		URL	🔲
String	Encode and Decode Strings (Premium)		URL	🔲
Tree	Maximum Depth of Binary Tree		URL	🔲
Tree	Same Tree		URL	🔲
Tree	Invert/Flip Binary Tree		URL	🔲
Tree	Binary Tree Maximum Path Sum		URL	🔲
Tree	Binary Tree Level Order Traversal		URL	🔲
Tree	Serialize and Deserialize Binary Tree		URL	🔲
Tree	Subtree of Another Tree		URL	🔲
Tree	Construct Binary Tree from Preorder and Inorder Traversal		URL	🔲
Tree	Validate Binary Search Tree		URL	🔲
Tree	Kth Smallest Element in a BST		URL	🔲
Tree	Lowest Common Ancestor of BST		URL	🔲
Tree	Implement Trie (Prefix Tree)		URL	🔲
Tree	Add and Search Word		URL	🔲
Tree	Word Search II		URL	🔲
Heap	Merge K Sorted Lists	Hard	URL	☑️
Heap	Top K Frequent Elements	Medium	URL	☑️
Heap	Find Median from Data Stream	Hard	URL	☑️