Blind 75

The famous Blind 75 — the 75 most-referenced LeetCode problems across 10 core patterns, originally curated on the Blind forum. Every problem already has a full write-up in the bank.

0 / 75 done

Array

Two Sum↻Easy
Best Time to Buy and Sell Stock↻Easy
Contains Duplicate↻Easy
Product of Array Except Self↻Medium
Maximum Subarray↻Medium
Maximum Product Subarray↻Medium
Find Minimum In Rotated Sorted Array↻Medium
Search In Rotated Sorted Array↻Medium
3Sum↻Medium
Container With Most Water↻Medium

Binary

Dynamic Programming

Graph

Clone Graph↻Medium
Course Schedule↻Medium
Pacific Atlantic Water Flow↻Medium
Number of Islands↻Medium
Longest Consecutive Sequence↻Medium
Alien Dictionary↻Hard
Graph Valid Tree↻Medium
Number of Connected Components In An Undirected Graph↻Medium

Interval

Linked List

Matrix

Set Matrix Zeroes↻Medium
Spiral Matrix↻Medium
Rotate Image↻Medium
Word Search↻Medium

String

Longest Substring Without Repeating Characters↻Medium
Longest Repeating Character Replacement↻Medium
Minimum Window Substring↻Hard
Valid Anagram↻Easy
Group Anagrams↻Medium
Valid Parentheses↻Easy
Valid Palindrome↻Easy
Longest Palindromic Substring↻Medium
Palindromic Substrings↻Medium
Encode and Decode Strings↻Medium

Tree

Maximum Depth of Binary Tree↻Easy
Same Tree↻Easy
Invert Binary Tree↻Easy
Binary Tree Maximum Path Sum↻Hard
Binary Tree Level Order Traversal↻Medium
Serialize And Deserialize Binary Tree↻Hard
Subtree of Another Tree↻Easy
Construct Binary Tree From Preorder And Inorder Traversal↻Medium
Validate Binary Search Tree↻Medium
Kth Smallest Element In a Bst↻Medium
Lowest Common Ancestor of a Binary Search Tree↻Medium
Implement Trie Prefix Tree↻Medium
Design Add And Search Words Data Structure↻Medium
Word Search II↻Hard

Heap

Top K Frequent Elements↻Medium
Find Median From Data Stream↻Hard