Topic-wise Curated List of Top 75 LeetCode

The key is to solve problems obsessively for a week or so right before the interviews.

This list groups the most commonly asked 75 LeetCode questions by topic, so you can drill one pattern at a time instead of jumping randomly.

Check off each problem as you solve it — your progress is saved locally in your browser.

Progress: 0/760%

Check off problems as you solve them. Progress is saved in your browser.

Array0/10 done

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

Binary0/5 done

• Sum of Two Integers
• Number of 1 Bits
• Counting Bits
• Missing Number
• Reverse Bits

Dynamic Programming0/11 done

• Climbing Stairs
• Coin Change
• Longest Increasing Subsequence
• Longest Common Subsequence
• Word Break
• Combination Sum IV
• House Robber
• House Robber II
• Decode Ways
• Unique Paths
• Jump Game

Graph0/8 done

• Clone Graph
• Course Schedule
• Pacific Atlantic Water Flow
• Number of Islands
• Longest Consecutive Sequence
• Alien Dictionary (Premium)
• Graph Valid Tree (Premium)
• Number of Connected Components in an Undirected Graph (Premium)

Interval0/5 done

• Insert Interval
• Merge Intervals
• Non-overlapping Intervals
• Meeting Rooms (Premium)
• Meeting Rooms II (Premium)

Linked List0/6 done

• Reverse Linked List
• Linked List Cycle
• Merge Two Sorted Lists
• Merge k Sorted Lists
• Remove Nth Node From End of List
• Reorder List

Matrix0/4 done

• Set Matrix Zeroes
• Spiral Matrix
• Rotate Image
• Word Search

String0/10 done

• Longest Substring Without Repeating Characters
• Longest Repeating Character Replacement
• Minimum Window Substring
• Valid Anagram
• Group Anagrams
• Valid Parentheses
• Valid Palindrome
• Longest Palindromic Substring
• Palindromic Substrings
• Encode and Decode Strings (Premium)

Tree0/14 done

• Maximum Depth of Binary Tree
• Same Tree
• Invert Binary Tree
• Binary Tree Maximum Path Sum
• Binary Tree Level Order Traversal
• Serialize and Deserialize Binary Tree
• Subtree of Another Tree
• Construct Binary Tree from Preorder and Inorder Traversal
• Validate Binary Search Tree
• Kth Smallest Element in a BST
• Lowest Common Ancestor of a Binary Search Tree
• Implement Trie (Prefix Tree)
• Add and Search Word
• Word Search II

Heap0/3 done

• Merge k Sorted Lists
• Top K Frequent Elements
• Find Median from Data Stream

How to use this list

1. Pick one topic (start with Array or String if you're short on time).
2. Solve every problem in that topic on LeetCode.
3. Check the box when done to track progress.
4. Move to the next topic once you can explain your approach without looking at notes.
5. Revisit premium-tagged problems if you have LeetCode Premium.

Source: New Year Gift — Curated List of Top 75 LeetCode Questions (Blind)

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• Blind 75 Must Do Leetcode
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