Master DSA Tracking Sheet

Curated Blueprint for College Academics & High-Tier Placement Preparation

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🟢 Module 1: The Core Foundations

1. Arrays & Hashing (The STL Warmup)

Contains Duplicate (LC 217)Easy
Valid Anagram (LC 242)Easy
Two Sum (LC 1)Easy
Group Anagrams (LC 49)Medium
Top K Frequent Elements (LC 347)Medium
Product of Array Except Self (LC 238)Medium
Longest Consecutive Sequence (LC 128)Medium
Kadane’s Algorithm / Max Subarray (LC 53)Medium
Next Permutation (LC 31)Medium

2. Two Pointers & Sliding Window

Valid Palindrome (LC 125)Easy
Two Sum II - Array Is Sorted (LC 167)Medium
3Sum (LC 15)Medium
Container With Most Water (LC 11)Medium
Best Time to Buy and Sell Stock (LC 121)Easy
Longest Substring Without Repeating Characters (LC 3)Medium
Longest Repeating Character Replacement (LC 424)Medium
Sliding Window Maximum (LC 239)Hard

3. Binary Search

Binary Search (LC 704)Easy
Search a 2D Matrix (LC 74)Medium
Find Minimum in Rotated Sorted Array (LC 153)Medium
Search in Rotated Sorted Array (LC 33)Medium
Koko Eating Bananas (LC 875)Medium
Capacity To Ship Packages Within D Days (LC 1011)Medium

🟡 Module 2: Classic Data Structures & Recursion

4. Linked Lists

Reverse Linked List (LC 206)Easy
Merge Two Sorted Lists (LC 21)Easy
Linked List Cycle (LC 141)Easy
Remove Nth Node From End of List (LC 19)Medium
Copy List with Random Pointer (LC 138)Medium
Add Two Numbers (LC 2)Medium
LRU Cache (LC 146)Hard

5. Stacks & Queues

Valid Parentheses (LC 20)Easy
Min Stack (LC 155)Medium
Evaluate Reverse Polish Notation (LC 150)Medium
Daily Temperatures (LC 739)Medium
Next Greater Element I (LC 496)Easy
Largest Rectangle in Histogram (LC 84)Hard

6. Recursion & Backtracking

Subsets (LC 78)Medium
Combination Sum (LC 39)Medium
Permutations (LC 46)Medium
Word Search (LC 79)Medium
N-Queens (LC 51)Hard

🔴 Module 3: Hierarchical & Advanced Algorithms

7. Trees & Binary Search Trees (BST)

Invert Binary Tree (LC 226)Easy
Maximum Depth of Binary Tree (LC 104)Easy
Diameter of Binary Tree (LC 543)Easy
Balanced Binary Tree (LC 110)Easy
Binary Tree Level Order Traversal (LC 102)Medium
Binary Tree Right Side View (LC 199)Medium
Validate Binary Search Tree (LC 98)Medium
Lowest Common Ancestor of a BT (LC 236)Medium
Construct Tree from Preorder & Inorder (LC 105)Medium
Binary Tree Maximum Path Sum (LC 124)Hard

8. Heaps & Priority Queues

Kth Largest Element in an Array (LC 215)Medium
Task Scheduler (LC 621)Medium
Find Median from Data Stream (LC 295)Hard

9. Graphs

Number of Islands (LC 200)Medium
Clone Graph (LC 133)Medium
Rotting Oranges (LC 994)Medium
Course Schedule (LC 207)Medium
Network Delay Time (LC 743)Medium
Number of Provinces (LC 547)Medium

10. Dynamic Programming

Climbing Stairs (LC 70)Easy
House Robber (LC 198)Medium
Coin Change (LC 322)Medium
Longest Increasing Subsequence (LC 300)Medium
Partition Equal Subset Sum (LC 416)Medium
Unique Paths (LC 62)Medium
Longest Common Subsequence (LC 1143)Medium
Edit Distance (LC 72)Hard

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