DSA Sheet

504 curated problems across 23 topics, merged from 6 popular sheets (Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z, Love Babbar 450). Filter by topic, difficulty, company, or sheet, track what you have solved, and share a filtered view with anyone.

Easy 101·Medium 332·Hard 71

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332

Hard

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Arrays

0 / 65

Problem	Difficulty	Platform	Companies	Sheets	Practice
Best Time to Buy and Sell Stock	Easy	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Can Place Flowers	Easy	LeetCode		NeetCode 250	OpenSoln
Concatenation of Array	Easy	LeetCode		NeetCode 250	OpenSoln
Contains Duplicate	Easy	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Design HashMap	Easy	LeetCode		NeetCode 250	OpenSoln
Design HashSet	Easy	LeetCode		NeetCode 250	OpenSoln
Design Parking System	Easy	LeetCode		NeetCode 250	OpenSoln
Find All Numbers Disappeared in An Array	Easy	LeetCode		NeetCode 250	OpenSoln
Find Pivot Index	Easy	LeetCode		NeetCode 250	OpenSoln
Find the Difference of Two Arrays	Easy	LeetCode		NeetCode 250	OpenSoln
Find The Index of The First Occurrence in a String	Easy	LeetCode		NeetCode 250	OpenSoln
Is Subsequence	Easy	LeetCode		NeetCode 250	OpenSoln
Isomorphic Strings	Easy	LeetCode		NeetCode 250	OpenSoln
Length of Last Word	Easy	LeetCode		NeetCode 250	OpenSoln
Majority Element	Easy	LeetCode	Amazon, Apple, Google	Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Maximum Number of Balloons	Easy	LeetCode		NeetCode 250	OpenSoln
Maximum Subarray	Easy	LeetCode	Amazon, Apple, Google, Microsoft	Blind 75, Grind 75, Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Move Zeroes	Easy	LeetCode	Amazon, Meta	Grind 75, NeetCode 250, Striver A2Z	OpenSoln
Pascal's Triangle	Easy	LeetCode	Amazon, Apple, Google	Grind 75, Striver A2Z	OpenSoln
Pascals Triangle	Easy	LeetCode		NeetCode 250	OpenSoln
Range Sum Query - Immutable	Easy	LeetCode		NeetCode 250	OpenSoln
Remove Element	Easy	LeetCode		NeetCode 250	OpenSoln
Replace Elements With Greatest Element On Right Side	Easy	LeetCode		NeetCode 250	OpenSoln
Sign of An Array	Easy	LeetCode		NeetCode 250	OpenSoln
Two Sum	Easy	LeetCode	Amazon, Apple, Google, Meta, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Unique Email Addresses	Easy	LeetCode		NeetCode 250	OpenSoln
Word Pattern	Easy	LeetCode		NeetCode 250	OpenSoln
Best Time to Buy And Sell Stock II	Medium	LeetCode		NeetCode 250	OpenSoln
Brick Wall	Medium	LeetCode		NeetCode 250	OpenSoln
Check if a String Contains all Binary Codes of Size K	Medium	LeetCode		NeetCode 250	OpenSoln
Continuous Subarray Sum	Medium	LeetCode		NeetCode 250	OpenSoln
Design Underground System	Medium	LeetCode		NeetCode 250	OpenSoln
Encode and Decode TinyURL	Medium	LeetCode		NeetCode 250	OpenSoln
Find All Anagrams in a String	Medium	LeetCode		NeetCode 250	OpenSoln
Find Duplicate Number	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, NeetCode 150, Striver A2Z	OpenSoln
Grid Game	Medium	LeetCode		NeetCode 250	OpenSoln
Insert Delete Get Random O(1)	Medium	LeetCode		NeetCode 250	OpenSoln
Insert Interval	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Longest Consecutive Sequence	Medium	LeetCode		Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Majority Element II	Medium	LeetCode	Amazon, Google	Striver A2Z	OpenSoln
Maximum Product of The Length of Two Palindromic Subsequences	Medium	LeetCode		NeetCode 250	OpenSoln
Maximum Product Subarray	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Merge Intervals	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Minimum Number of Swaps to Make The String Balanced	Medium	LeetCode		NeetCode 250	OpenSoln
Minimum Penalty for a Shop	Medium	LeetCode		NeetCode 250	OpenSoln
Next Permutation	Medium	LeetCode	Amazon, Google, Microsoft	Love Babbar 450, Striver A2Z	OpenSoln
Non Decreasing Array	Medium	LeetCode		NeetCode 250	OpenSoln
Number of Pairs of Interchangeable Rectangles	Medium	LeetCode		NeetCode 250	OpenSoln
Number of Zero-Filled Subarrays	Medium	LeetCode		NeetCode 250	OpenSoln
Optimal Partition of String	Medium	LeetCode		NeetCode 250	OpenSoln
Product of Array Except Self	Medium	LeetCode	Amazon, Apple, Google, Meta, Microsoft	Blind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Push Dominoes	Medium	LeetCode		NeetCode 250	OpenSoln
Range Sum Query 2D Immutable	Medium	LeetCode		NeetCode 250	OpenSoln
Repeated DNA Sequences	Medium	LeetCode		NeetCode 250	OpenSoln
Rotate Array	Medium	LeetCode	Amazon, Microsoft	Love Babbar 450, NeetCode 250, Striver A2Z	OpenSoln
Sort an Array	Medium	LeetCode		NeetCode 250	OpenSoln
Sort Colors	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Subarray Sum Equals K	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Top K Frequent Elements	Medium	LeetCode		Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Unique Length 3 Palindromic Subsequences	Medium	LeetCode		NeetCode 250	OpenSoln
Valid Sudoku	Medium	LeetCode		NeetCode 150, NeetCode 250	OpenSoln
Wiggle Sort	Medium	LeetCode		NeetCode 250	OpenSoln
First Missing Positive	Hard	LeetCode		NeetCode 250	OpenSoln
Naming a Company	Hard	LeetCode		NeetCode 250	OpenSoln
Text Justification	Hard	LeetCode		NeetCode 250	OpenSoln

Strings

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Valid Anagram	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Valid Palindrome	Easy	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Count and Say	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Encode and Decode Strings	Medium	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Group Anagrams	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
KMP Algorithm / Find the Index of the First Occurrence in a String	Medium	LeetCode	Amazon, Google, Microsoft	Love Babbar 450, Striver A2Z	Open
Longest Palindromic Substring	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Palindromic Substrings	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Rabin-Karp / Repeated String Match	Medium	LeetCode	Google	Striver A2Z	Open
Reverse Words in a String	Medium	LeetCode	Amazon, Google, Microsoft	Grind 75, NeetCode 150, Striver A2Z	Open
String to Integer (atoi)	Medium	LeetCode	Amazon, Google, Microsoft	Love Babbar 450, Striver A2Z	Open
Zigzag Conversion	Medium	LeetCode	Amazon, Google	NeetCode 250, Striver A2Z	Open

Two Pointers

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Merge Sorted Array	Easy	LeetCode		NeetCode 250	Open
Merge Strings Alternately	Easy	LeetCode		NeetCode 250	Open
Minimum Difference Between Highest And Lowest of K Scores	Easy	LeetCode		NeetCode 250	Open
Remove Duplicates From Sorted Array	Easy	LeetCode		NeetCode 250	Open
Reverse String	Easy	LeetCode		NeetCode 250	Open
Valid Palindrome II	Easy	LeetCode		NeetCode 250	Open
3Sum	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, Grind 75, Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
3Sum Closest	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
4Sum	Medium	LeetCode	Amazon, Google	Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	Open
Array With Elements Not Equal to Average of Neighbors	Medium	LeetCode		NeetCode 250	Open
Boats to Save People	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Container With Most Water	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Count the Number of Good Subarrays	Medium	LeetCode	Google	Striver A2Z	Open
Minimum Operations to Reduce X to Zero	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Number of Subsequences That Satisfy The Given Sum Condition	Medium	LeetCode		NeetCode 250	Open
Remove Duplicates from Sorted Array II	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Two Sum II Input Array Is Sorted	Medium	LeetCode		NeetCode 150, NeetCode 250	Open
Trapping Rain Water	Hard	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, Grind 75, Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln

Sliding Window

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Contains Duplicate II	Easy	LeetCode		NeetCode 250	Open
Count Number of Nice Subarrays	Medium	LeetCode	Amazon	Striver A2Z	Open
Find K Closest Elements	Medium	LeetCode		NeetCode 250	Open
Frequency of The Most Frequent Element	Medium	LeetCode		NeetCode 250	Open
Fruit Into Baskets	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Fruits into Basket	Medium	LeetCode		NeetCode 250	Open
Longest Repeating Character Replacement	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Longest Substring Without Repeating Characters	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Max Consecutive Ones III	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Maximum Number of Vowels in a Substring of Given Length	Medium	LeetCode		NeetCode 250	Open
Maximum Points You Can Obtain from Cards	Medium	LeetCode	Amazon, Google	Love Babbar 450, NeetCode 250, Striver A2Z	Open
Minimum Number of Flips to Make The Binary String Alternating	Medium	LeetCode		NeetCode 250	Open
Minimum Size Subarray Sum	Medium	LeetCode		NeetCode 250	Open
Number of Sub Arrays of Size K and Avg Greater than or Equal to Threshold	Medium	LeetCode		NeetCode 250	Open
Permutation in String	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Subarray Product Less Than K	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Minimum Window Substring	Hard	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Sliding Window Maximum	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln

Binary Search

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Arranging Coins	Easy	LeetCode		NeetCode 250	Open
Binary Search	Easy	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	Open
Guess Number Higher Or Lower	Easy	LeetCode		NeetCode 250	Open
Search Insert Position	Easy	LeetCode		NeetCode 250	Open
Squares of a Sorted Array	Easy	LeetCode		NeetCode 250	Open
Valid Perfect Square	Easy	LeetCode		NeetCode 250	Open
Aggressive Cows	Medium	GeeksforGeeks	Amazon	Love Babbar 450, Striver A2Z	Open
Capacity to Ship Packages	Medium	LeetCode		NeetCode 250	Open
Find First And Last Position of Element In Sorted Array	Medium	LeetCode		NeetCode 250	Open
Find Minimum in Rotated Sorted Array	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Find Peak Element	Medium	LeetCode		NeetCode 250	Open
Koko Eating Bananas	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Maximum Number of Removable Characters	Medium	LeetCode		NeetCode 250	Open
Minimize the Maximum Difference of Pairs	Medium	LeetCode		NeetCode 250	Open
Search a 2D Matrix	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Search in Rotated Sorted Array	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, Grind 75, Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Search In Rotated Sorted Array II	Medium	LeetCode		NeetCode 250	Open
Search Suggestions System	Medium	LeetCode		NeetCode 250	Open
Single Element in a Sorted Array	Medium	LeetCode		NeetCode 250	Open
Successful Pairs of Spells and Potions	Medium	LeetCode		NeetCode 250	Open
Time Based Key-Value Store	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Allocate Books	Hard	GeeksforGeeks	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Median of Two Sorted Arrays	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Split Array Largest Sum	Hard	LeetCode	Amazon, Google	NeetCode 250, Striver A2Z	Open

Sorting

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Largest Number	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Merge Sort	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Quick Sort	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Wiggle Sort II	Medium	LeetCode	Google	Striver A2Z	Open

Matrix

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Game of Life	Medium	LeetCode	Amazon, Google, Microsoft	Grind 75, NeetCode 150, Striver A2Z	Open
Rotate Image	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Search a 2D Matrix II	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Set Matrix Zeroes	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Spiral Matrix	Medium	LeetCode	Amazon, Apple, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Spiral Matrix II	Medium	LeetCode	Amazon, Google	Love Babbar 450, NeetCode 250, Striver A2Z	Open

Stack & Queue

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Baseball Game	Easy	LeetCode		NeetCode 250	Open
Implement Stack Using Queues	Easy	LeetCode		NeetCode 250	Open
Next Greater Element I	Easy	LeetCode	Amazon, Google	Love Babbar 450, NeetCode 250, Striver A2Z	Open
Valid Parentheses	Easy	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
132 Pattern	Medium	LeetCode		NeetCode 250	Open
Asteroid Collision	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 250, Striver A2Z	Open
Car Fleet	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Daily Temperatures	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Decode String	Medium	LeetCode		NeetCode 250	Open
Evaluate Reverse Polish Notation	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Generate Parentheses	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Min Stack	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Next Greater Element II	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Online Stock Span	Medium	LeetCode		NeetCode 250	Open
Remove All Adjacent Duplicates In String II	Medium	LeetCode		NeetCode 250	Open
Remove K Digits	Medium	LeetCode		NeetCode 250	Open
Removing Stars From a String	Medium	LeetCode		NeetCode 250	Open
Simplify Path	Medium	LeetCode		NeetCode 250	Open
Sum of Subarray Minimums	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Validate Stack Sequences	Medium	LeetCode		NeetCode 250	Open
Largest Rectangle in Histogram	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Maximal Rectangle	Hard	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Maximum Frequency Stack	Hard	LeetCode	Google, Meta	NeetCode 150, NeetCode 250	Open

Linked List

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Intersection of Two Linked Lists	Easy	LeetCode		NeetCode 250	Open
Linked List Cycle	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Merge Two Sorted Lists	Easy	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Middle of the Linked List	Easy	LeetCode		NeetCode 250	Open
Palindrome Linked List	Easy	LeetCode		NeetCode 250	Open
Remove Duplicates From Sorted List	Easy	LeetCode		NeetCode 250	Open
Remove Linked List Elements	Easy	LeetCode		NeetCode 250	Open
Reverse a Linked List	Easy	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150	OpenSoln
Reverse Linked List	Easy	LeetCode		Blind 75, NeetCode 150, NeetCode 250	Open
Add Two Numbers	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Add Two Numbers II	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Copy List with Random Pointer	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Design Browser History	Medium	LeetCode		NeetCode 250	Open
Design Circular Queue	Medium	LeetCode		NeetCode 250	Open
Design Linked List	Medium	LeetCode		NeetCode 250	Open
Find The Duplicate Number	Medium	LeetCode		NeetCode 150, NeetCode 250	Open
Flatten a Multilevel Doubly Linked List	Medium	LeetCode	Amazon, Google, Microsoft	Striver A2Z	Open
Insertion Sort List	Medium	LeetCode		NeetCode 250	Open
LRU Cache	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Maximum Twin Sum Of A Linked List	Medium	LeetCode		NeetCode 250	Open
Partition List	Medium	LeetCode		NeetCode 250	Open
Remove Nth Node From End of List	Medium	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Reorder List	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Reverse Linked List II	Medium	LeetCode		NeetCode 250	Open
Rotate List	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Sort List	Medium	LeetCode		NeetCode 250	Open
Split Linked List in Parts	Medium	LeetCode		NeetCode 250	Open
Swap Nodes In Pairs	Medium	LeetCode		NeetCode 250	Open
Swapping Nodes in a Linked List	Medium	LeetCode		NeetCode 250	Open
LFU Cache	Hard	LeetCode	Amazon, Google	NeetCode 250, Striver A2Z	Open
Merge K Sorted Lists	Hard	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Reverse Nodes in k-Group	Hard	LeetCode	Amazon, Google, Microsoft	Blind 75, NeetCode 150, NeetCode 250	OpenSoln

Recursion

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Flood Fill	Easy	LeetCode	Amazon, Google, Meta	Grind 75, NeetCode 150, Striver A2Z	Open
Pow(x, n) - Recursion	Medium	LeetCode	Amazon, Google	Striver A2Z	Open
Reverse a Stack using Recursion	Medium	GeeksforGeeks	Amazon	Love Babbar 450, Striver A2Z	Open
Sort a Stack using Recursion	Medium	GeeksforGeeks	Amazon	Love Babbar 450, Striver A2Z	Open
Tower of Hanoi	Medium	GeeksforGeeks	Amazon, Microsoft	Love Babbar 450, Striver A2Z	Open

Backtracking

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Combination Sum	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Combination Sum II	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Combinations	Medium	LeetCode		NeetCode 250	Open
Find Unique Binary String	Medium	LeetCode		NeetCode 250	Open
Letter Combinations of a Phone Number	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
M-Coloring Problem	Medium	GeeksforGeeks	Google	Love Babbar 450, Striver A2Z	Open
Matchsticks to Square	Medium	LeetCode		NeetCode 250	Open
Maximum Length of a Concatenated String With Unique Characters	Medium	LeetCode		NeetCode 250	Open
Palindrome Partitioning	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250, Striver A2Z	Open
Partition to K Equal Sum Subsets	Medium	LeetCode	Amazon, Google	NeetCode 250, Striver A2Z	Open
Permutations	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Permutations II	Medium	LeetCode		NeetCode 250	Open
Rat in a Maze	Medium	GeeksforGeeks	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Restore IP Addresses	Medium	LeetCode		NeetCode 250	Open
Splitting a String Into Descending Consecutive Values	Medium	LeetCode		NeetCode 250	Open
Subsets	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Subsets II	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Word Search	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Expression Add Operators	Hard	LeetCode	Amazon, Google, Meta	Striver A2Z	Open
N Queens II	Hard	LeetCode		NeetCode 250	Open
N-Queens	Hard	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Sudoku Solver	Hard	LeetCode	Amazon, Google, Microsoft	NeetCode 150, Striver A2Z	Open

Binary Trees

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Problem	Difficulty	Platform	Companies	Sheets	Practice
Balanced Binary Tree	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Binary Tree Inorder Traversal	Easy	LeetCode		NeetCode 250	Open
Binary Tree Postorder Traversal	Easy	LeetCode		NeetCode 250	Open
Binary Tree Preorder Traversal	Easy	LeetCode		NeetCode 250	Open
Construct String From Binary Tree	Easy	LeetCode		NeetCode 250	Open
Convert Sorted Array to Binary Search Tree	Easy	LeetCode		NeetCode 250	Open
Diameter of Binary Tree	Easy	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Invert Binary Tree	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Maximum Depth of Binary Tree	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Merge Two Binary Trees	Easy	LeetCode		NeetCode 250	Open
Minimum Distance between BST Nodes	Easy	LeetCode		NeetCode 250	Open
Path Sum	Easy	LeetCode		NeetCode 250	Open
Same Tree	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Subtree of Another Tree	Easy	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Symmetric Tree	Easy	LeetCode		NeetCode 250	Open
All Possible Full Binary Trees	Medium	LeetCode		NeetCode 250	Open
Binary Search Tree Iterator	Medium	LeetCode		NeetCode 250	Open
Binary Tree Level Order Traversal	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Binary Tree Right Side View	Medium	LeetCode	Amazon, Google, Meta	Grind 75, NeetCode 150, NeetCode 250	Open
Binary Tree Zigzag Level Order Traversal	Medium	LeetCode		NeetCode 250	Open
Check Completeness of a Binary Tree	Medium	LeetCode		NeetCode 250	Open
Construct Binary Tree from Inorder and Postorder Traversal	Medium	LeetCode		NeetCode 250	Open
Construct Binary Tree from Preorder and Inorder	Medium	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150	OpenSoln
Construct Binary Tree From Preorder And Inorder Traversal	Medium	LeetCode		Blind 75, NeetCode 150, NeetCode 250	Open
Construct Quad Tree	Medium	LeetCode		NeetCode 250	Open
Convert Bst to Greater Tree	Medium	LeetCode		NeetCode 250	Open
Count Complete Tree Nodes	Medium	LeetCode	Amazon, Google	Striver A2Z	Open
Count Good Nodes In Binary Tree	Medium	LeetCode		NeetCode 150, NeetCode 250	Open
Delete Node in a BST	Medium	LeetCode		NeetCode 250	Open
Find Bottom Left Tree Value	Medium	LeetCode		NeetCode 250	Open
Find Duplicate Subtrees	Medium	LeetCode		NeetCode 250	Open
Flatten Binary Tree to Linked List	Medium	LeetCode	Amazon, Google, Microsoft	NeetCode 150, Striver A2Z	Open
Flip Equivalent Binary Trees	Medium	LeetCode		NeetCode 250	Open
House Robber III	Medium	LeetCode		NeetCode 250	Open
Insert into a Binary Search Tree	Medium	LeetCode		NeetCode 250	Open
Kth Smallest Element In a Bst	Medium	LeetCode		Blind 75, NeetCode 150, NeetCode 250	Open
Lowest Common Ancestor of a Binary Search Tree	Medium	LeetCode		Blind 75, NeetCode 150, NeetCode 250	Open
Maximum Width of Binary Tree	Medium	LeetCode		NeetCode 250	Open
Minimum Time to Collect All Apples in a Tree	Medium	LeetCode		NeetCode 250	Open
Morris Inorder Traversal	Medium	LeetCode	Amazon, Google	Striver A2Z	Open
Operations On Tree	Medium	LeetCode		NeetCode 250	Open
Populating Next Right Pointers in Each Node	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Sum Root to Leaf Numbers	Medium	LeetCode		NeetCode 250	Open
Time Needed to Inform All Employees	Medium	LeetCode		NeetCode 250	Open
Trim a Binary Search Tree	Medium	LeetCode		NeetCode 250	Open
Unique Binary Search Trees	Medium	LeetCode		NeetCode 250	Open
Unique Binary Search Trees II	Medium	LeetCode		NeetCode 250	Open
Binary Tree Maximum Path Sum	Hard	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Serialize and Deserialize Binary Tree	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Vertical Order Traversal of a Binary Tree	Hard	LeetCode	Amazon, Google, Meta	NeetCode 150, Striver A2Z	Open

BST

0 / 5

Problem	Difficulty	Platform	Companies	Sheets	Practice
Kth Smallest Element in BST	Medium	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150	OpenSoln
Largest BST Subtree	Medium	LeetCode	Amazon	Love Babbar 450, Striver A2Z	Open
Lowest Common Ancestor of BST	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150	OpenSoln
Recover Binary Search Tree	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Validate Binary Search Tree	Medium	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln

Heaps

0 / 21

Problem	Difficulty	Platform	Companies	Sheets	Practice
Kth Largest Element in a Stream	Easy	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Last Stone Weight	Easy	LeetCode	Amazon	NeetCode 150, NeetCode 250	Open
Car Pooling	Medium	LeetCode		NeetCode 250	Open
Design Twitter	Medium	LeetCode	Amazon, Meta	NeetCode 150, NeetCode 250	Open
Find K Pairs with Smallest Sums	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Find The Kth Largest Integer In The Array	Medium	LeetCode		NeetCode 250	Open
K Closest Points to Origin	Medium	LeetCode	Amazon, Google, Meta	Grind 75, NeetCode 150, NeetCode 250	Open
Kth Largest Element in an Array	Medium	LeetCode	Amazon, Google, Meta	Grind 75, NeetCode 150, NeetCode 250	Open
Longest Happy String	Medium	LeetCode		NeetCode 250	Open
Maximum Subsequence Score	Medium	LeetCode		NeetCode 250	Open
Process Tasks Using Servers	Medium	LeetCode		NeetCode 250	Open
Reorganize String	Medium	LeetCode		NeetCode 250	Open
Seat Reservation Manager	Medium	LeetCode		NeetCode 250	Open
Single Threaded Cpu	Medium	LeetCode		NeetCode 250	Open
Task Scheduler	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Find Median from Data Stream	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
IPO	Hard	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Maximum Performance of a Team	Hard	LeetCode		NeetCode 250	Open
Minimize Deviation in Array	Hard	LeetCode		NeetCode 250	Open
Minimum Number of Refueling Stops	Hard	LeetCode	Amazon, Google	Striver A2Z	Open
Trapping Rain Water II	Hard	LeetCode	Amazon, Google	Striver A2Z	Open

Tries

0 / 7

Problem	Difficulty	Platform	Companies	Sheets	Practice
Longest Common Prefix	Easy	LeetCode	Amazon, Google, Microsoft	Grind 75, NeetCode 250, Striver A2Z	Open
Count Distinct Substrings using Trie	Medium	GeeksforGeeks	Google	Striver A2Z	Open
Design Add and Search Words Data Structure	Medium	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Extra Characters in a String	Medium	LeetCode		NeetCode 250	Open
Implement Trie (Prefix Tree)	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Maximum XOR of Two Numbers in an Array	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Word Search II	Hard	LeetCode	Amazon, Google, Microsoft	Blind 75, NeetCode 150, NeetCode 250	OpenSoln

Graphs

0 / 60

Problem	Difficulty	Platform	Companies	Sheets	Practice
Island Perimeter	Easy	LeetCode		NeetCode 250	Open
Verifying An Alien Dictionary	Easy	LeetCode		NeetCode 250	Open
Accounts Merge	Medium	LeetCode		NeetCode 250	Open
As Far from Land as Possible	Medium	LeetCode		NeetCode 250	Open
Bellman-Ford Algorithm	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Bipartite Graph Check	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Cheapest Flights Within K Stops	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Check if Move Is Legal	Medium	LeetCode		NeetCode 250	Open
Clone Graph	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Count Sub Islands	Medium	LeetCode		NeetCode 250	Open
Course Schedule	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Course Schedule II	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Course Schedule IV	Medium	LeetCode		NeetCode 250	Open
Detonate the Maximum Bombs	Medium	LeetCode		NeetCode 250	Open
Disjoint Set Union (DSU)	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Evaluate Division	Medium	LeetCode		NeetCode 250	Open
Find Closest Node to Given Two Nodes	Medium	LeetCode		NeetCode 250	Open
Find Eventual Safe States	Medium	LeetCode		NeetCode 250	Open
Floyd-Warshall Algorithm	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Graph Valid Tree	Medium	LeetCode	Google	Blind 75, NeetCode 150, NeetCode 250	Open
Is Graph Bipartite?	Medium	LeetCode		NeetCode 250	Open
Max Area of Island	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Min Cost to Connect All Points	Medium	LeetCode		NeetCode 150, NeetCode 250	Open
Minimum Fuel Cost to Report to the Capital	Medium	LeetCode		NeetCode 250	Open
Minimum Number of Vertices to Reach all Nodes	Medium	LeetCode		NeetCode 250	Open
Minimum Score of a Path Between Two Cities	Medium	LeetCode		NeetCode 250	Open
Minimum Spanning Tree - Kruskal's	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Minimum Spanning Tree - Prim's	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Network Delay Time	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Number of Closed Islands	Medium	LeetCode		NeetCode 250	Open
Number of Connected Components In An Undirected Graph	Medium	LeetCode		Blind 75, NeetCode 150, NeetCode 250	Open
Number of Connected Components in Undirected Graph	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150	Open
Number of Enclaves	Medium	LeetCode		NeetCode 250	Open
Number of Islands	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Open The Lock	Medium	LeetCode		NeetCode 250	Open
Pacific Atlantic Water Flow	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Path with Maximum Probability	Medium	LeetCode		NeetCode 250	Open
Path with Minimum Effort	Medium	LeetCode		NeetCode 250	Open
Redundant Connection	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Reorder Routes to Make All Paths Lead to The City Zero	Medium	LeetCode		NeetCode 250	Open
Rotting Oranges	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Shortest Bridge	Medium	LeetCode		NeetCode 250	Open
Shortest Path in Binary Matrix	Medium	LeetCode		NeetCode 250	Open
Shortest Path with Alternating Colors	Medium	LeetCode		NeetCode 250	Open
Snakes And Ladders	Medium	LeetCode		NeetCode 250	Open
Surrounded Regions	Medium	LeetCode	Google	NeetCode 150, NeetCode 250	Open
Walls and Gates	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Alien Dictionary	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Articulation Points	Hard	GeeksforGeeks	Amazon, Google	Striver A2Z	Open
Bridges in a Graph	Hard	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Find Critical and Pseudo Critical Edges in Minimum Spanning Tree	Hard	LeetCode		NeetCode 250	Open
Largest Color Value in a Directed Graph	Hard	LeetCode		NeetCode 250	Open
Making a Large Island	Hard	LeetCode	Amazon, Google	Striver A2Z	Open
Minimum Number of Days to Eat N Oranges	Hard	LeetCode		NeetCode 250	Open
Number of Good Paths	Hard	LeetCode		NeetCode 250	Open
Reconstruct Itinerary	Hard	LeetCode		NeetCode 150, NeetCode 250	Open
Remove Max Number of Edges to Keep Graph Fully Traversable	Hard	LeetCode		NeetCode 250	Open
Strongly Connected Components - Kosaraju's	Hard	GeeksforGeeks	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Swim in Rising Water	Hard	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Word Ladder	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln

Intervals

0 / 2

Done	Problem	Difficulty	Platform	Companies	Sheets	Practice
	Remove Covered Intervals	Medium	LeetCode		NeetCode 250	Open
	Data Stream as Disjoint Intervals	Hard	LeetCode		NeetCode 250	Open

Segment Tree

0 / 3

Problem	Difficulty	Platform	Companies	Sheets	Practice
Range Minimum Query - Segment Tree	Medium	GeeksforGeeks	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Range Sum Query - Segment Tree	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Count of Smaller Numbers After Self	Hard	LeetCode	Amazon, Google	Striver A2Z	Open

Fenwick Tree

0 / 2

Done	Problem	Difficulty	Platform	Companies	Sheets	Practice
	Fenwick Tree - Point Update Range Sum	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
	Count of Range Sum	Hard	LeetCode	Google	Striver A2Z	Open

Dynamic Programming

0 / 68

Problem	Difficulty	Platform	Companies	Sheets	Practice
Climbing Stairs	Easy	LeetCode	Amazon, Apple, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Min Cost Climbing Stairs	Easy	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
N-th Tribonacci Number	Easy	LeetCode		NeetCode 250	Open
Best Team with no Conflicts	Medium	LeetCode		NeetCode 250	Open
Best Time to Buy and Sell Stock with Cooldown	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Best Time to Buy and Sell Stock with Transaction Fee	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Check if There is a Valid Partition For The Array	Medium	LeetCode		NeetCode 250	Open
Coin Change	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Coin Change II	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Combination Sum IV	Medium	LeetCode		NeetCode 250	Open
Count Ways to Build Good Strings	Medium	LeetCode		NeetCode 250	Open
Decode Ways	Medium	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Delete And Earn	Medium	LeetCode		NeetCode 250	Open
Edit Distance	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Flip String to Monotone Increasing	Medium	LeetCode		NeetCode 250	Open
House Robber	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
House Robber II	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Integer Break	Medium	LeetCode		NeetCode 250	Open
Interleaving String	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Jump Game VII	Medium	LeetCode	Google	NeetCode 250, Striver A2Z	Open
Last Stone Weight II	Medium	LeetCode		NeetCode 250	Open
Longest Common Subsequence	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Longest Increasing Subsequence	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Longest Palindromic Subsequence	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Maximal Square	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Maximum Alternating Subsequence Sum	Medium	LeetCode		NeetCode 250	Open
Maximum Subarray Min Product	Medium	LeetCode		NeetCode 250	Open
Maximum Sum Increasing Subsequence	Medium	LeetCode	Amazon	Love Babbar 450, Striver A2Z	Open
Minimum Cost For Tickets	Medium	LeetCode		NeetCode 250	Open
Minimum Path Sum	Medium	LeetCode	Amazon, Google, Microsoft	Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	Open
New 21 Game	Medium	LeetCode		NeetCode 250	Open
Number of Longest Increasing Subsequence	Medium	LeetCode		NeetCode 250	Open
Ones and Zeroes	Medium	LeetCode		NeetCode 250	Open
Paint House	Medium	LeetCode		NeetCode 250	Open
Partition Equal Subset Sum	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Perfect Squares	Medium	LeetCode		NeetCode 250	Open
Solving Questions With Brainpower	Medium	LeetCode		NeetCode 250	Open
Stone Game	Medium	LeetCode		NeetCode 250	Open
Stone Game II	Medium	LeetCode		NeetCode 250	Open
Target Sum	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Triangle	Medium	LeetCode		NeetCode 250	Open
Uncrossed Lines	Medium	LeetCode		NeetCode 250	Open
Unique Paths	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Unique Paths II	Medium	LeetCode		NeetCode 250	Open
Word Break	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Best Time to Buy and Sell Stock III	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, Striver A2Z	OpenSoln
Best Time to Buy and Sell Stock IV	Hard	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Burst Balloons	Hard	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Concatenated Words	Hard	LeetCode		NeetCode 250	Open
Count all Valid Pickup and Delivery Options	Hard	LeetCode		NeetCode 250	Open
Count Vowels Permutation	Hard	LeetCode		NeetCode 250	Open
Distinct Subsequences	Hard	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Find the Longest Valid Obstacle Course at Each Position	Hard	LeetCode		NeetCode 250	Open
Longest Increasing Path in a Matrix	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Matrix Chain Multiplication	Hard	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Maximize Score after N Operations	Hard	LeetCode		NeetCode 250	Open
Maximum Value of K Coins from Piles	Hard	LeetCode		NeetCode 250	Open
Minimum Cost to Cut a Stick	Hard	LeetCode	Amazon, Google	NeetCode 250, Striver A2Z	Open
Minimum Edit Distance	Hard	LeetCode	Amazon, Microsoft	Love Babbar 450, Striver A2Z	Open
Number of Music Playlists	Hard	LeetCode		NeetCode 250	Open
Number of Ways to Form a Target String Given a Dictionary	Hard	LeetCode		NeetCode 250	Open
Number of Ways to Rearrange Sticks With K Sticks Visible	Hard	LeetCode		NeetCode 250	Open
Palindrome Partitioning II	Hard	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Profitable Schemes	Hard	LeetCode		NeetCode 250	Open
Regular Expression Matching	Hard	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Stickers to Spell Word	Hard	LeetCode		NeetCode 250	Open
Stone Game III	Hard	LeetCode		NeetCode 250	Open
Wildcard Matching	Hard	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open

Greedy

0 / 24

Problem	Difficulty	Platform	Companies	Sheets	Practice
Meeting Rooms	Easy	LeetCode	Amazon, Google, Meta	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
Activity Selection Problem	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Dota2 Senate	Medium	LeetCode		NeetCode 250	Open
Eliminate Maximum Number of Monsters	Medium	LeetCode		NeetCode 250	Open
Fractional Knapsack	Medium	GeeksforGeeks	Amazon	Love Babbar 450, Striver A2Z	Open
Gas Station	Medium	LeetCode	Amazon, Google, Meta	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Hand of Straights	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Jump Game	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, Love Babbar 450, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Jump Game II	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	Open
Longest Turbulent Array	Medium	LeetCode		NeetCode 250	Open
Maximum Length of Pair Chain	Medium	LeetCode		NeetCode 250	Open
Maximum Meetings in One Room	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Maximum Sum Circular Subarray	Medium	LeetCode		NeetCode 250	Open
Meeting Rooms II	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Merge Triplets to Form Target Triplet	Medium	LeetCode	Amazon	NeetCode 150, NeetCode 250	Open
Minimize Maximum of Array	Medium	LeetCode		NeetCode 250	Open
Minimum Deletions to Make Character Frequencies Unique	Medium	LeetCode		NeetCode 250	Open
Minimum Number of Arrows to Burst Balloons	Medium	LeetCode	Amazon, Google	NeetCode 150	Open
Non-overlapping Intervals	Medium	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Partition Labels	Medium	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Two City Scheduling	Medium	LeetCode		NeetCode 250	Open
Valid Parenthesis String	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Candy	Hard	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250, Striver A2Z	Open
Minimum Interval to Include Each Query	Hard	LeetCode	Google	NeetCode 150, NeetCode 250	Open

Bit Manipulation

0 / 13

Problem	Difficulty	Platform	Companies	Sheets	Practice
Add Binary	Easy	LeetCode		NeetCode 250	Open
Add to Array-Form of Integer	Easy	LeetCode		NeetCode 250	Open
Counting Bits	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Missing Number	Easy	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Number of 1 Bits	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Power of Two	Easy	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Reverse Bits	Easy	LeetCode	Amazon, Google	Blind 75, NeetCode 150, NeetCode 250	Open
Shuffle the Array	Easy	LeetCode		NeetCode 250	Open
Single Number	Easy	LeetCode	Amazon, Google	Blind 75, Grind 75, NeetCode 150, NeetCode 250	OpenSoln
Reverse Integer	Medium	LeetCode		NeetCode 150, NeetCode 250	Open
Single Number II	Medium	LeetCode	Amazon, Google	NeetCode 150, Striver A2Z	Open
Sum of Two Integers	Medium	LeetCode	Amazon, Google, Meta, Microsoft	Blind 75, NeetCode 150, NeetCode 250	OpenSoln
XOR Queries of a Subarray	Medium	LeetCode	Amazon	Striver A2Z	Open

Math

0 / 20

Problem	Difficulty	Platform	Companies	Sheets	Practice
Count Odd Numbers in an Interval Range	Easy	LeetCode		NeetCode 250	Open
Excel Sheet Column Number	Easy	LeetCode	Amazon, Microsoft	Grind 75, Love Babbar 450	Open
Excel Sheet Column Title	Easy	LeetCode		NeetCode 250	Open
Greatest Common Divisor of Strings	Easy	LeetCode		NeetCode 250	Open
Happy Number	Easy	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250	Open
Matrix Diagonal Sum	Easy	LeetCode		NeetCode 250	Open
Palindrome Number	Easy	LeetCode		NeetCode 250	Open
Plus One	Easy	LeetCode	Amazon, Google	Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	Open
Roman to Integer	Easy	LeetCode	Amazon, Google, Meta	Grind 75, NeetCode 250, Striver A2Z	Open
Shift 2D Grid	Easy	LeetCode		NeetCode 250	Open
Sqrt(x)	Easy	LeetCode	Amazon, Google	Grind 75, NeetCode 250, Striver A2Z	Open
Ugly Number	Easy	LeetCode		NeetCode 250	Open
Count Primes	Medium	LeetCode	Amazon, Google	Love Babbar 450, Striver A2Z	Open
Detect Squares	Medium	LeetCode	Google	NeetCode 150, NeetCode 250	Open
Find Missing Observations	Medium	LeetCode		NeetCode 250	Open
Integer to Roman	Medium	LeetCode	Amazon, Google, Meta	Love Babbar 450, NeetCode 250, Striver A2Z	Open
Multiply Strings	Medium	LeetCode	Amazon, Google	NeetCode 150, NeetCode 250	Open
Pow(x, n)	Medium	LeetCode	Amazon, Google, Microsoft	Blind 75, Grind 75, NeetCode 150, NeetCode 250, Striver A2Z	OpenSoln
Robot Bounded In Circle	Medium	LeetCode		NeetCode 250	Open
Maximum Points on a Line	Hard	LeetCode		NeetCode 250	Open