Neetcode 150

Commonly used algorithms

Strings => Z Function Pattern Match

Arrays & Hashing

Problems	Tags	References
Contains Duplicate		notes | link
Valid Anagram		notes | link
Two Sum		notes | link
Group Anagrams		notes | link
Top K Frequent Elements		notes | link
Encode and Decode Strings		notes | link
⭐Product of Array Except Self		notes | link
Valid Sudoku		notes | link
⭐Longest Consecutive Sequence		notes | link

Two Pointers

Problems	Tags	References
Valid Palindrome		notes | link
Two Sum II Input Array Is Sorted		notes | link
⭐3Sum		notes | link
Container With Most Water		notes | link
⭐Trapping Rain Water		notes | link

Sliding Window

Problems	Tags	References
Best Time to Buy And Sell Stock		notes | link
Longest Substring Without Repeating Characters		notes | link
⭐Longest Repeating Character Replacement		notes | link
Permutation In String		notes | link
⭐Minimum Window Substring		notes | link
Sliding Window Maximum		notes | link

Stack

Problems	Tags	References
Valid Parentheses		notes | link
Min Stack		notes | link
Evaluate Reverse Polish Notation		notes | link
Daily Temperatures		notes | link
⭐Car Fleet		notes | link
⭐Largest Rectangle In Histogram		notes | link

Binary Search

Refresher

Problems	Tags	References
Binary Search		notes | link
Search a 2D Matrix		notes | link
Koko Eating Bananas		notes | link
Find Minimum In Rotated Sorted Array		notes | link
Search In Rotated Sorted Array		notes | link
Time Based Key Value Store		notes | link
⭐Median of Two Sorted Arrays		notes | link

Linked List

Floyd's Cycle Detection

Problems	Tags	References
Reverse Linked List		notes | link
Merge Two Sorted Lists		notes | link
Linked List Cycle		notes | link
⭐Reorder List		notes | link
Remove Nth Node From End of List		notes | link
Copy List With Random Pointer		notes | link
Add Two Numbers		notes | link
Find The Duplicate Number		notes | link
⭐LRU Cache		notes | link
Merge K Sorted Lists		notes | link
⭐Reverse Nodes In K Group		notes | link

Trees

Refresher

Problems	Tags	References
Invert Binary Tree		notes | link
Maximum Depth of Binary Tree		notes | link
Diameter of Binary Tree		notes | link
Balanced Binary Tree		notes | link
Same Tree		notes | link
Subtree of Another Tree		notes | link
Lowest Common Ancestor of a Binary Search Tree		notes | link
Binary Tree Level Order Traversal		notes | link
Binary Tree Right Side View		notes | link
Count Good Nodes In Binary Tree		notes | link
Validate Binary Search Tree		notes | link
⭐Kth Smallest Element in a BST		notes | link
Construct Binary Tree From Preorder And Inorder Traversal		notes | link
⭐Binary Tree Maximum Path Sum		notes | link
Serialize And Deserialize Binary Tree		notes | link