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📚 Complete DSA Problem List

Problems Difficulty Levels LeetCode Integration

A comprehensive collection of Data Structures and Algorithms problems

📖 Table of Contents

🎯 How to Use This List

Legend

Symbol Meaning
🟢 Easy
🟡 Medium
🔴 Hard
🔗 LeetCode Link Available
⭐ Highly Recommended
🎯 Interview Favorite

Before You Start

  1. Create an Issue: For the problem you want to solve (mention problem number and language)
  2. Wait for Assignment: A maintainer will assign the issue to you
  3. Start Coding: Only after assignment
  4. Submit PR: Link your PR to the issue

🟢 Basic Programming & Arithmetic

Fundamental operations and programming concepts

# Problem Difficulty LeetCode Tags
Q1 Hello World Program 🟢 - Basics
Q2 Sum of Two Numbers 🟢 - Arithmetic
Q3 Area of Circle 🟢 - Math
Q4 Simple Interest Calculator 🟢 - Math
Q5 Celsius to Fahrenheit Conversion 🟢 - Math
Q6 Swap Two Numbers (with/without temp) 🟢 - Logic
Q7 Check Even or Odd 🟢 - Basics
Q8 Find Maximum of Three Numbers 🟢 - Logic
Q9 Calculate Power (a^b) 🟢 🔗 Pow(x, n) Math

🟡 Control Flow & Decision Making

Conditionals and logical operations

# Problem Difficulty LeetCode Tags
Q10 Check Positive, Negative or Zero 🟢 - Conditions
Q11 Grade Calculator (A-F) 🟢 - If-Else
Q12 Find Largest of Three Numbers 🟢 - Logic
Q13 Check Vowel or Consonant 🟢 - Characters
Q14 Simple Calculator (+, -, *, /) 🟢 - Switch Case
Q15 Leap Year Checker 🟢 - Logic
Q16 Check Triangle Validity 🟢 🔗 Valid Triangle Number Math

🟠 Loops, Functions & Recursion

Iteration, function design, and recursive thinking

# Problem Difficulty LeetCode Tags
Q17 Print Numbers 1 to N 🟢 - Loops
Q18 Sum of N Natural Numbers 🟢 - Math
Q19 Factorial of a Number 🟢 🔗 Factorial Trailing Zeroes Recursion
Q20 Fibonacci Series 🟢 🔗 Fibonacci Number ⭐ Recursion, DP
Q21 Check Prime Number 🟢 🔗 Count Primes Math
Q22 Print Prime Numbers in Range 🟢 - Loops
Q23 Sum of Digits 🟢 🔗 Add Digits Math
Q24 Reverse a Number 🟢 🔗 Reverse Integer 🎯 Math
Q25 Check Palindrome Number 🟢 🔗 Palindrome Number ⭐ Logic
Q26 Check Armstrong Number 🟢 - Math
Q27 LCM and GCD 🟢 - Math
Q28 Print Multiplication Table 🟢 - Loops
Q29 Count Digits in a Number 🟢 - Math
Q30 Binary to Decimal Conversion 🟢 - Number System
Q31 Decimal to Binary Conversion 🟢 - Number System
Q32 Print All Divisors 🟢 - Math
Q33 Perfect Number Checker 🟢 🔗 Perfect Number Math
Q34 Tower of Hanoi 🟡 - Recursion
Q35 Power Using Recursion 🟢 🔗 Pow(x, n) Recursion
Q36 Sum of Array using Recursion 🟢 - Recursion
Q37 Print Pattern (Stars/Numbers) 🟢 - Loops
Q38 Print Pyramid Pattern 🟢 - Loops
Q39 Print Diamond Pattern 🟢 - Loops
Q40 Print Floyd's Triangle 🟢 - Patterns
Q41 Print Pascal's Triangle 🟡 🔗 Pascal's Triangle ⭐ Arrays, Math
Q42 Sieve of Eratosthenes 🟡 🔗 Count Primes Math, Array

🔵 Arrays & Matrices

Array manipulation and matrix operations

# Problem Difficulty LeetCode Tags
Q43 Find Sum of Array Elements 🟢 - Arrays
Q44 Find Largest Element in Array 🟢 - Arrays
Q45 Find Smallest Element in Array 🟢 - Arrays
Q46 Reverse an Array 🟢 🔗 Reverse String Arrays
Q47 Count Even and Odd Numbers 🟢 - Arrays
Q48 Linear Search 🟢 - Searching
Q49 Binary Search 🟢 🔗 Binary Search ⭐ 🎯 Searching
Q50 Find Second Largest Element 🟢 - Arrays
Q51 Remove Duplicates from Sorted Array 🟢 🔗 Remove Duplicates ⭐ 🎯 Two Pointers
Q52 Rotate Array 🟡 🔗 Rotate Array ⭐ Arrays
Q53 Move Zeros to End 🟢 🔗 Move Zeroes ⭐ 🎯 Two Pointers
Q54 Find Missing Number 🟢 🔗 Missing Number ⭐ Math, Arrays
Q55 Two Sum Problem 🟢 🔗 Two Sum ⭐ 🎯 Hashing
Q56 Three Sum Problem 🟡 🔗 3Sum 🎯 Two Pointers
Q57 Four Sum Problem 🟡 🔗 4Sum Two Pointers
Q58 Maximum Subarray Sum (Kadane's) 🟡 🔗 Maximum Subarray ⭐ 🎯 DP
Q59 Best Time to Buy and Sell Stock 🟢 🔗 Best Time to Buy and Sell Stock ⭐ 🎯 Arrays
Q60 Container With Most Water 🟡 🔗 Container With Most Water ⭐ 🎯 Two Pointers
Q61 Product of Array Except Self 🟡 🔗 Product of Array Except Self ⭐ 🎯 Arrays
Q62 Majority Element 🟢 🔗 Majority Element ⭐ Moore's Voting
Q63 Sort Colors (Dutch National Flag) 🟡 🔗 Sort Colors ⭐ Two Pointers
Q64 Merge Sorted Arrays 🟢 🔗 Merge Sorted Array 🎯 Two Pointers
Q65 Find Duplicate Number 🟡 🔗 Find the Duplicate Number ⭐ Floyd's Cycle
Q66 Set Matrix Zeroes 🟡 🔗 Set Matrix Zeroes 🎯 Matrix
Q67 Spiral Matrix 🟡 🔗 Spiral Matrix ⭐ 🎯 Matrix
Q68 Rotate Matrix 90 Degrees 🟡 🔗 Rotate Image 🎯 Matrix
Q69 Search in 2D Matrix 🟡 🔗 Search a 2D Matrix Binary Search
Q70 Merge Intervals 🟡 🔗 Merge Intervals ⭐ 🎯 Sorting

🟣 Strings & Pattern Matching

String processing and algorithms

# Problem Difficulty LeetCode Tags
Q71 String Length (without library) 🟢 - Strings
Q72 Reverse a String 🟢 🔗 Reverse String Strings
Q73 Check Palindrome String 🟢 🔗 Valid Palindrome ⭐ Strings
Q74 Count Vowels and Consonants 🟢 - Strings
Q75 Compare Two Strings 🟢 - Strings
Q76 Concatenate Strings 🟢 - Strings
Q77 Count Words in String 🟢 - Strings
Q78 Remove Spaces from String 🟢 - Strings
Q79 Convert to Uppercase/Lowercase 🟢 - Strings
Q80 Check Anagram 🟢 🔗 Valid Anagram ⭐ 🎯 Hashing
Q81 First Non-Repeating Character 🟢 🔗 First Unique Character ⭐ Hashing
Q82 Longest Substring Without Repeating Characters 🟡 🔗 Longest Substring Without Repeating ⭐ 🎯 Sliding Window
Q83 String to Integer (atoi) 🟡 🔗 String to Integer (atoi) 🎯 Strings
Q84 Longest Common Prefix 🟢 🔗 Longest Common Prefix Strings
Q85 Group Anagrams 🟡 🔗 Group Anagrams ⭐ Hashing
Q86 Valid Parentheses 🟢 🔗 Valid Parentheses ⭐ 🎯 Stack
Q87 Longest Palindromic Substring 🟡 🔗 Longest Palindromic Substring ⭐ 🎯 DP
Q88 Implement strStr() 🟡 🔗 Find Index of First Occurrence Pattern Matching
Q89 Count and Say 🟡 🔗 Count and Say Strings
Q90 KMP Pattern Matching 🔴 - ⭐ Pattern Matching

🔴 Searching & Sorting

Classic search and sort algorithms

# Problem Difficulty LeetCode Tags
Q91 Linear Search 🟢 - Searching
Q92 Binary Search 🟢 🔗 Binary Search ⭐ Searching
Q93 Search in Rotated Sorted Array 🟡 🔗 Search in Rotated Array ⭐ 🎯 Binary Search
Q94 Find First and Last Position 🟡 🔗 Find First and Last Position 🎯 Binary Search
Q95 Search Insert Position 🟢 🔗 Search Insert Position Binary Search
Q96 Bubble Sort 🟢 - ⭐ Sorting
Q97 Selection Sort 🟢 - ⭐ Sorting
Q98 Insertion Sort 🟢 - ⭐ Sorting
Q99 Merge Sort 🟡 🔗 Sort an Array ⭐ 🎯 Sorting
Q100 Quick Sort 🟡 🔗 Sort an Array ⭐ 🎯 Sorting
Q101 Heap Sort 🟡 - ⭐ Sorting
Q102 Counting Sort 🟢 - Sorting
Q103 Radix Sort 🟡 - Sorting
Q104 Find Peak Element 🟡 🔗 Find Peak Element Binary Search
Q105 Kth Largest Element 🟡 🔗 Kth Largest Element ⭐ 🎯 Heap, Quick Select

🟤 Linked Lists

Single, double, and circular linked lists

# Problem Difficulty LeetCode Tags
Q106 Create and Traverse Linked List 🟢 - Linked List
Q107 Insert at Beginning 🟢 - Linked List
Q108 Insert at End 🟢 - Linked List
Q109 Insert at Position 🟢 - Linked List
Q110 Delete from Beginning 🟢 - Linked List
Q111 Delete from End 🟢 - Linked List
Q112 Delete from Position 🟢 - Linked List
Q113 Search in Linked List 🟢 - Linked List
Q114 Reverse Linked List 🟢 🔗 Reverse Linked List ⭐ 🎯 Linked List
Q115 Find Middle of Linked List 🟢 🔗 Middle of Linked List ⭐ Two Pointers
Q116 Detect Cycle in Linked List 🟢 🔗 Linked List Cycle ⭐ 🎯 Floyd's Cycle
Q117 Find Cycle Starting Point 🟡 🔗 Linked List Cycle II ⭐ Floyd's Cycle
Q118 Remove Nth Node from End 🟡 🔗 Remove Nth Node From End ⭐ 🎯 Two Pointers
Q119 Merge Two Sorted Lists 🟢 🔗 Merge Two Sorted Lists ⭐ 🎯 Linked List
Q120 Palindrome Linked List 🟢 🔗 Palindrome Linked List ⭐ Linked List
Q121 Intersection of Two Linked Lists 🟢 🔗 Intersection of Two Linked Lists ⭐ Linked List
Q122 Add Two Numbers (Lists) 🟡 🔗 Add Two Numbers ⭐ 🎯 Linked List
Q123 Sort Linked List 🟡 🔗 Sort List 🎯 Merge Sort
Q124 Remove Duplicates from Sorted List 🟢 🔗 Remove Duplicates from Sorted List Linked List
Q125 Copy List with Random Pointer 🟡 🔗 Copy List with Random Pointer 🎯 Linked List

⚫ Stacks & Queues

LIFO and FIFO data structures

# Problem Difficulty LeetCode Tags
Q126 Implement Stack using Array 🟢 - Stack
Q127 Implement Stack using Linked List 🟢 - Stack
Q128 Implement Queue using Array 🟢 - Queue
Q129 Implement Queue using Linked List 🟢 - Queue
Q130 Valid Parentheses 🟢 🔗 Valid Parentheses ⭐ 🎯 Stack
Q131 Implement Stack using Queues 🟢 🔗 Implement Stack using Queues Stack, Queue
Q132 Implement Queue using Stacks 🟢 🔗 Implement Queue using Stacks Stack, Queue
Q133 Next Greater Element 🟡 🔗 Next Greater Element I ⭐ Stack
Q134 Largest Rectangle in Histogram 🔴 🔗 Largest Rectangle in Histogram ⭐ 🎯 Stack
Q135 Min Stack 🟡 🔗 Min Stack ⭐ 🎯 Stack Design
Q136 Daily Temperatures 🟡 🔗 Daily Temperatures ⭐ Stack
Q137 Evaluate Reverse Polish Notation 🟡 🔗 Evaluate Reverse Polish Notation Stack
Q138 Sliding Window Maximum 🔴 🔗 Sliding Window Maximum ⭐ 🎯 Deque

🟩 Trees & Binary Search Trees

Binary trees, BST, and traversals

# Problem Difficulty LeetCode Tags
Q139 Create Binary Tree 🟢 - Trees
Q140 Inorder Traversal 🟢 🔗 Binary Tree Inorder Traversal ⭐ Trees
Q141 Preorder Traversal 🟢 🔗 Binary Tree Preorder Traversal ⭐ Trees
Q142 Postorder Traversal 🟢 🔗 Binary Tree Postorder Traversal ⭐ Trees
Q143 Level Order Traversal 🟡 🔗 Binary Tree Level Order Traversal ⭐ 🎯 BFS
Q144 Maximum Depth of Binary Tree 🟢 🔗 Maximum Depth of Binary Tree ⭐ 🎯 Trees
Q145 Invert Binary Tree 🟢 🔗 Invert Binary Tree ⭐ 🎯 Trees
Q146 Same Tree 🟢 🔗 Same Tree Trees
Q147 Symmetric Tree 🟢 🔗 Symmetric Tree ⭐ Trees
Q148 Path Sum 🟢 🔗 Path Sum Trees
Q149 Diameter of Binary Tree 🟢 🔗 Diameter of Binary Tree ⭐ 🎯 Trees
Q150 Lowest Common Ancestor (BST) 🟡 🔗 Lowest Common Ancestor of BST ⭐ 🎯 BST
Q151 Validate Binary Search Tree 🟡 🔗 Validate Binary Search Tree ⭐ 🎯 BST
Q152 Kth Smallest Element in BST 🟡 🔗 Kth Smallest Element in BST ⭐ 🎯 BST
Q153 Construct Binary Tree from Traversals 🟡 🔗 Construct Binary Tree 🎯 Trees
Q154 Binary Tree Right Side View 🟡 🔗 Binary Tree Right Side View ⭐ Trees
Q155 Serialize and Deserialize Binary Tree 🔴 🔗 Serialize and Deserialize Binary Tree 🎯 Trees
Q156 Binary Tree Maximum Path Sum 🔴 🔗 Binary Tree Maximum Path Sum ⭐ 🎯 Trees

🌐 Graphs

Graph traversal and algorithms

# Problem Difficulty LeetCode Tags
Q157 Create Graph (Adjacency List/Matrix) 🟢 - Graphs
Q158 BFS Traversal 🟢 - ⭐ BFS
Q159 DFS Traversal 🟢 - ⭐ DFS
Q160 Number of Islands 🟡 🔗 Number of Islands ⭐ 🎯 DFS/BFS
Q161 Clone Graph 🟡 🔗 Clone Graph 🎯 DFS/BFS
Q162 Course Schedule 🟡 🔗 Course Schedule ⭐ 🎯 Topological Sort
Q163 Course Schedule II 🟡 🔗 Course Schedule II 🎯 Topological Sort
Q164 Pacific Atlantic Water Flow 🟡 🔗 Pacific Atlantic Water Flow DFS/BFS
Q165 Word Ladder 🔴 🔗 Word Ladder 🎯 BFS
Q166 Dijkstra's Shortest Path 🟡 🔗 Network Delay Time ⭐ 🎯 Graph
Q167 Bellman-Ford Algorithm 🟡 - ⭐ Graph
Q168 Floyd-Warshall Algorithm 🟡 - Graph
Q169 Detect Cycle in Directed Graph 🟡 - DFS
Q170 Detect Cycle in Undirected Graph 🟡 - DFS/Union-Find
Q171 Minimum Spanning Tree (Prim's) 🟡 - ⭐ Graph
Q172 Minimum Spanning Tree (Kruskal's) 🟡 - ⭐ Union-Find
Q173 Graph Coloring Problem 🔴 - Backtracking

🟦 Dynamic Programming

Memoization and tabulation techniques

# Problem Difficulty LeetCode Tags
Q174 Fibonacci (DP) 🟢 🔗 Fibonacci Number ⭐ DP
Q175 Climbing Stairs 🟢 🔗 Climbing Stairs ⭐ 🎯 DP
Q176 House Robber 🟡 🔗 House Robber ⭐ 🎯 DP
Q177 House Robber II 🟡 🔗 House Robber II 🎯 DP
Q178 Coin Change 🟡 🔗 Coin Change ⭐ 🎯 DP
Q179 Longest Increasing Subsequence 🟡 🔗 Longest Increasing Subsequence ⭐ 🎯 DP
Q180 Longest Common Subsequence 🟡 🔗 Longest Common Subsequence ⭐ 🎯 DP
Q181 Edit Distance 🔴 🔗 Edit Distance ⭐ 🎯 DP
Q182 0/1 Knapsack Problem 🟡 - ⭐ DP
Q183 Unbounded Knapsack 🟡 🔗 Coin Change 2 DP
Q184 Partition Equal Subset Sum 🟡 🔗 Partition Equal Subset Sum ⭐ DP
Q185 Palindromic Substrings 🟡 🔗 Palindromic Substrings DP
Q186 Word Break 🟡 🔗 Word Break ⭐ 🎯 DP
Q187 Decode Ways 🟡 🔗 Decode Ways 🎯 DP
Q188 Unique Paths 🟡 🔗 Unique Paths ⭐ DP
Q189 Unique Paths II 🟡 🔗 Unique Paths II DP
Q190 Minimum Path Sum 🟡 🔗 Minimum Path Sum ⭐ DP
Q191 Triangle 🟡 🔗 Triangle DP
Q192 Maximum Product Subarray 🟡 🔗 Maximum Product Subarray ⭐ 🎯 DP
Q193 Jump Game 🟡 🔗 Jump Game ⭐ Greedy/DP
Q194 Jump Game II 🟡 🔗 Jump Game II 🎯 Greedy/DP
Q195 Longest Palindromic Subsequence 🟡 🔗 Longest Palindromic Subsequence DP
Q196 Matrix Chain Multiplication 🔴 - ⭐ DP
Q197 Egg Dropping Problem 🔴 🔗 Super Egg Drop DP
Q198 Burst Balloons 🔴 🔗 Burst Balloons 🎯 DP
Q199 Regular Expression Matching 🔴 🔗 Regular Expression Matching 🎯 DP
Q200 Wildcard Matching 🔴 🔗 Wildcard Matching 🎯 DP

🔺 Heaps & Priority Queues

Heap data structure and applications

# Problem Difficulty LeetCode Tags
Q201 Implement Min Heap 🟢 - ⭐ Heap
Q202 Implement Max Heap 🟢 - ⭐ Heap
Q203 Kth Largest Element 🟡 🔗 Kth Largest Element ⭐ 🎯 Heap
Q204 Top K Frequent Elements 🟡 🔗 Top K Frequent Elements ⭐ 🎯 Heap
Q205 Merge K Sorted Lists 🔴 🔗 Merge k Sorted Lists ⭐ 🎯 Heap
Q206 Find Median from Data Stream 🔴 🔗 Find Median from Data Stream ⭐ 🎯 Heap Design
Q207 Task Scheduler 🟡 🔗 Task Scheduler 🎯 Heap, Greedy
Q208 Kth Smallest Element in Sorted Matrix 🟡 🔗 Kth Smallest Element Heap

#️⃣ Hashing & Hash Tables

Hash table implementation and problems

# Problem Difficulty LeetCode Tags
Q209 Implement Hash Table 🟢 - ⭐ Hashing
Q210 Two Sum 🟢 🔗 Two Sum ⭐ 🎯 Hashing
Q211 Group Anagrams 🟡 🔗 Group Anagrams ⭐ Hashing
Q212 Valid Anagram 🟢 🔗 Valid Anagram ⭐ Hashing
Q213 Contains Duplicate 🟢 🔗 Contains Duplicate Hashing
Q214 Longest Consecutive Sequence 🟡 🔗 Longest Consecutive Sequence ⭐ 🎯 Hashing
Q215 Subarray Sum Equals K 🟡 🔗 Subarray Sum Equals K ⭐ 🎯 Prefix Sum
Q216 LRU Cache 🟡 🔗 LRU Cache ⭐ 🎯 Design
Q217 LFU Cache 🔴 🔗 LFU Cache 🎯 Design

🔢 Bit Manipulation

Bitwise operations and tricks

# Problem Difficulty LeetCode Tags
Q218 Count Set Bits 🟢 🔗 Number of 1 Bits ⭐ Bits
Q219 Check if Power of Two 🟢 🔗 Power of Two Bits
Q220 Single Number 🟢 🔗 Single Number ⭐ 🎯 Bits
Q221 Single Number II 🟡 🔗 Single Number II Bits
Q222 Single Number III 🟡 🔗 Single Number III Bits
Q223 Reverse Bits 🟢 🔗 Reverse Bits Bits
Q224 Missing Number 🟢 🔗 Missing Number ⭐ Bits
Q225 Sum of Two Integers 🟡 🔗 Sum of Two Integers 🎯 Bits
Q226 Counting Bits 🟢 🔗 Counting Bits ⭐ Bits, DP

🌟 Advanced Data Structures

Tries, segment trees, and more

# Problem Difficulty LeetCode Tags
Q227 Implement Trie (Prefix Tree) 🟡 🔗 Implement Trie ⭐ 🎯 Trie
Q228 Add and Search Word 🟡 🔗 Design Add and Search Words 🎯 Trie
Q229 Word Search II 🔴 🔗 Word Search II ⭐ 🎯 Trie, Backtracking
Q230 Longest Word in Dictionary 🟡 🔗 Longest Word in Dictionary Trie
Q231 Disjoint Set Union (Union-Find) 🟡 - ⭐ Union-Find
Q232 Number of Connected Components 🟡 🔗 Number of Connected Components Union-Find
Q233 Redundant Connection 🟡 🔗 Redundant Connection Union-Find
Q234 Segment Tree (Range Query) 🔴 🔗 Range Sum Query - Mutable ⭐ Segment Tree
Q235 Fenwick Tree (Binary Indexed Tree) 🔴 - ⭐ BIT
Q236 Suffix Array 🔴 - String

🎯 Curated Problem Sheets

Looking for structured learning paths? Check out these curated problem sheets:

🔥 Striver's SDE Sheet

Striver's SDE Sheet

180+ problems covering all DSA topics for placement preparation

Curated by Raj Vikramaditya (Striver) - Perfect for interview preparation

📖 View Full Sheet →

💻 NeetCode 150

NeetCode 150

150 most important LeetCode problems with video explanations

Organized by topic with detailed video solutions

📖 View Full List →

🎓 Blind 75

Blind 75

75 essential LeetCode problems for technical interviews

Most commonly asked questions by top tech companies

📖 View Full List →

📊 LeetCode Patterns

LeetCode Patterns

Problems organized by common patterns and techniques

14 essential patterns covering 150+ problems

📖 View Pattern List →

🏆 AlgoExpert

AlgoExpert

Curated list with video explanations and multiple solutions

Includes coding interview tips and space-time complexity analysis

📖 View Problems →

🌐 Additional Resources

📚 Study Plans

LeetCode Study Plans

Structured 30-day, 50-day, and 75-day study plans

🎯 Interview Prep

Tech Interview Handbook

Complete guide to tech interviews

💡 Problem Solving

Codeforces

Competitive programming practice

📈 Difficulty Distribution

🟢 Easy Problems: 90
🟡 Medium Problems: 115
🔴 Hard Problems: 31
─────────────────────────
📊 Total: 236 Problems

🎓 How to Use This List Effectively

For Beginners

  1. Start with Basic Programming & Arithmetic (Q1-Q9)
  2. Move to Control Flow (Q10-Q16)
  3. Master Loops and Recursion (Q17-Q42)
  4. Practice Arrays thoroughly (Q43-Q70)
  5. Learn Strings (Q71-Q90)

For Intermediate Learners

  1. Master Searching & Sorting algorithms
  2. Deep dive into Linked Lists
  3. Learn Stacks & Queues
  4. Start with Trees fundamentals
  5. Begin Dynamic Programming basics

For Advanced Learners

  1. Master Graphs and all traversal techniques
  2. Complete Advanced DP problems
  3. Learn Advanced Data Structures (Tries, Segment Trees)
  4. Practice Hard problems from each category
  5. Follow curated sheets for interview prep

🔍 Problem Solving Tips

Strategy

  • ✅ Read the problem carefully and understand constraints
  • ✅ Think about edge cases before coding
  • ✅ Start with brute force, then optimize
  • ✅ Analyze time and space complexity
  • ✅ Test with multiple test cases
  • ✅ Comment your code for clarity

Resources for Learning

📝 Contributing New Problems

Want to add a problem to this list?

  1. Check for duplicates - Ensure the problem isn't already listed
  2. Follow the format - Use the table structure above
  3. Include details - Problem name, difficulty, LeetCode link (if available), and tags
  4. Submit via PR - Create a pull request with your additions

⚡ Quick Links

Resource Link
📖 Main README View
🤝 Contributing Guide View
📊 Contributors List View
🐛 Report Issue Create Issue
🌟 Star History View

🚀 Start Your DSA Journey Today!

Pick a Problem | Create Issue | Read Guidelines

Happy Coding! 💻✨

Curated & documented with ❤️ by Ayush Hardeniya