| Ramp |
Spreadsheet String Concatenation with Dependent Cells |
Hard |
🆕 Sep 18, 2026 |
| Citadel |
Design a Top-Ten Trade Query with Exact Amounts |
Medium |
🆕 Sep 18, 2026 |
| Houzz |
Convert a Column Number to an Excel-Style Label |
Easy |
🆕 Sep 18, 2026 |
| Instacart |
Calculate Inventory Purchases with Buy-X-Get-Y-Free Coupons |
Medium |
🆕 Sep 18, 2026 |
| Sig |
Rotate a Square Matrix Clockwise While Both Diagonals Stay Fixed |
Hard |
🆕 Sep 17, 2026 |
| OpenAI |
Order Tasks with Dependencies Using a Deterministic Topological Sort |
Medium |
🆕 Sep 17, 2026 |
| Sig |
Count Equal-Difference Triples After Each Add or Remove-All Operation |
Hard |
🆕 Sep 17, 2026 |
| Ziphq |
Find the Guaranteed Capture Time in a Turn-Based Graph Game |
Hard |
🆕 Sep 17, 2026 |
| Google |
Repeatedly Delete Leaves Matching a Target Value From a Binary Tree |
Medium |
🆕 Sep 16, 2026 |
| Capital One |
Team Ranking Based on Scores and Goal Difference |
Medium |
🆕 Sep 16, 2026 |
| Together AI |
Split a Chunked Text Stream into Line-Balanced Parts |
Medium |
🆕 Sep 15, 2026 |
| xAI |
Load and Display a React List with useEffect |
Medium |
🆕 Sep 15, 2026 |
| xAI |
Implement an Asynchronous React Typeahead |
Medium |
🆕 Sep 15, 2026 |
| Cohere |
Implement a Card-Details Form with Dependent Validation |
Medium |
🆕 Sep 15, 2026 |
| Amazon |
Order Dependent Tasks and Identify Work to Rerun |
Medium |
🆕 Sep 14, 2026 |
| Amazon |
Merge Sorted Event Streams Through an Iterator |
Medium |
🆕 Sep 14, 2026 |
| AMD |
Find the Largest K Elements with Partitioning |
Medium |
🆕 Sep 14, 2026 |
| IBM |
VM Rental Revenue from Changing Stock |
Medium |
🆕 Sep 14, 2026 |
| Rippling |
Bill Deliveries with Historical Rates and Deferred Rounding |
Hard |
🆕 Sep 13, 2026 |
| Upstart |
Check Whether Two Words Are Case-Insensitive Anagrams |
Easy |
🆕 Sep 12, 2026 |
| Oracle |
Count Islands and Return the Largest Island Size |
Medium |
🆕 Sep 11, 2026 |
| Stripe |
Financial Account Ledger |
Medium |
🆕 Sep 11, 2026 |
| Stripe |
Hierarchical CSV Task / Subtask Formatter |
Medium |
🆕 Sep 11, 2026 |
| Airwallex |
Merge Hundreds of Paginated Sorted Sources into One Deduplicated Record Stream |
Hard |
🆕 Sep 10, 2026 |
| DoorDash |
Build an Order-Exception Microservice with Explicit Refund Policies |
Hard |
🆕 Sep 10, 2026 |
| Wayfair |
Simulate and Compare Multi-Armed Bandit Strategies |
Medium |
🆕 Sep 10, 2026 |
| Microsoft |
Find Unique Zero-Sum Triplets |
Medium |
🆕 Sep 10, 2026 |
| Microsoft |
Find the First Value Repeated During a Left-to-Right Scan |
Easy |
🆕 Sep 10, 2026 |
| Google |
Temperature Monitoring Data Structure |
Medium |
🆕 Sep 10, 2026 |
| Google |
Robot Status Message Deduplication |
Medium |
🆕 Sep 10, 2026 |
| Wayfair |
Maximize the Product of Pair Distance and Minimum Value |
Hard |
🆕 Sep 09, 2026 |
| Uber |
Sort a Matrix into Snake Order Using Adjacent Swaps |
Medium |
🆕 Sep 09, 2026 |
| Snapchat |
Render an Organization Chart and Find Skip-Level Pairs |
Medium |
🆕 Sep 09, 2026 |
| Uber |
Answer Repeated Shortest Increasing-Path Queries |
Hard |
🆕 Sep 09, 2026 |
| Roblox |
File Chunk Range Tracking |
Medium |
🆕 Sep 09, 2026 |
| Microsoft |
Delete and Earn (LC 740) |
Medium |
🆕 Sep 09, 2026 |
| Google |
Minimum-Cost Tree Disconnection |
Hard |
🆕 Sep 09, 2026 |
| OpenAI |
Debug a Transformer Implementation and Implement a KV Cache for Decoding |
Hard |
🆕 Sep 08, 2026 |
| Capital One |
Find Repeated-Value Patterns in a Matrix |
Medium |
🆕 Sep 07, 2026 |
| Instacart |
Calculate a Basket Total from Delimited Product Records |
Easy |
🆕 Sep 06, 2026 |
| Databricks |
Tic-Tac-Toe Against a Deterministic Automatic Opponent |
Medium |
🆕 Sep 06, 2026 |
| Databricks |
Referral Credit Tracker with Indirect Referrals |
Hard |
🆕 Sep 06, 2026 |
| Snowflake |
Find the Minimum Fleet for a Bus Timetable |
Medium |
🆕 Sep 05, 2026 |
| Snowflake |
Find the Minimum Bus Fleet with Station Constraints |
Hard |
🆕 Sep 05, 2026 |
| Amazon |
Timestamped Key-Value Store |
Easy |
🆕 Sep 05, 2026 |
| Robinhood |
Define and Calculate Employee Referral Counts |
Hard |
🆕 Sep 04, 2026 |
| Verkada |
Validate a Partially Filled Sudoku Board |
Medium |
🆕 Sep 04, 2026 |
| Siemens |
Batch and Pad Variable-Length Vectors with Optional Final-Batch Dropping |
Medium |
🆕 Sep 04, 2026 |
| LinkedIn |
Nested List Weight Sum II (LC 364) |
Medium |
🆕 Sep 04, 2026 |
| Stripe |
Subtract Blocked Periods from Allowed Deployment Windows |
Medium |
🆕 Sep 04, 2026 |
| ByteDance |
Restore IP Addresses |
Medium |
🆕 Sep 04, 2026 |
| Mercor |
Review an Asynchronous Cache for Races, Memory Growth, and Thread Safety |
Hard |
🆕 Sep 03, 2026 |
| Google |
Evolve Duplicate Detection for Sliding Windows and Read-Heavy Queries |
Hard |
🆕 Sep 03, 2026 |
| Snowflake |
Compute Effective Letter Permissions in a DAG |
Hard |
🆕 Sep 03, 2026 |
| Airwallex |
Largest Square of Ones |
Medium |
Sep 02, 2026 |
| Amazon |
Generalize Dictionary Merging |
Medium |
Sep 02, 2026 |
| Microsoft |
Detect Repeated Patterns in a String Sequence |
Medium |
Sep 02, 2026 |
| Amazon |
Binary Array Rearrangement |
Medium |
Sep 02, 2026 |
| Google |
Next-Word Predictor |
Medium |
Sep 02, 2026 |
| Pinterest |
Reason About Nested JSON Schema Validation |
Hard |
Sep 01, 2026 |
| DoorDash |
Debug the Last-Element Random Allocation Case |
Medium |
Sep 01, 2026 |
| Harvey |
Find Duplicate Files While Handling Symbolic-Link Cycles |
Hard |
Sep 01, 2026 |
| Harvey |
Allocate Unique File Names in an In-Memory Vault |
Medium |
Sep 01, 2026 |
| Amazon |
NumPy Mean and Variance with MLE Follow-Up |
Medium |
Sep 01, 2026 |
| Amazon |
Maximum Frequency Stack |
Hard |
Sep 01, 2026 |
| Amazon |
Top K Frequent Elements (LC 347) with a Follow-Up Variant |
Hard |
Sep 01, 2026 |
| Mercor |
Shortest Grid Path with Obstacle Eliminations |
Hard |
Aug 30, 2026 |
| Google |
Find the Longest Continuous Increasing Subsequence |
Easy |
Aug 30, 2026 |
| Microsoft |
Recover Sorted Digits from Scrambled English Number Words |
Medium |
Aug 30, 2026 |
| Microsoft |
Parse a Signed Integer in an Arbitrary Base |
Medium |
Aug 30, 2026 |
| Microsoft |
Keep Stable Unique Column Names Across Schema Changes |
Hard |
Aug 30, 2026 |
| Microsoft |
Convert a Hexadecimal Address to Dotted IPv4 |
Medium |
Aug 30, 2026 |
| Amazon |
Delivery-Center Grid — Minimum Inconvenience |
Hard |
Aug 30, 2026 |
| Squarepoint |
Count Files Safely from Bash |
Medium |
Aug 29, 2026 |
| Squarepoint / Uber |
Shortest Subarray with at Least K Distinct Values |
Medium |
Aug 29, 2026 |
| Squarepoint |
Find Values Whose Removal Minimizes Pairing Cost |
Hard |
Aug 29, 2026 |
| Snapchat |
Find the Smallest Range Covering K Sorted Lists |
Hard |
Aug 28, 2026 |
| Oracle |
Accounts Merge (LC 721) |
Hard |
Aug 28, 2026 |
| Palantir |
Stack Item and Category Coupons with an Eighty-Percent Cap |
Hard |
Aug 27, 2026 |
| Palantir |
Optimize Coupon Selection Under a Twenty-Point Budget |
Hard |
Aug 27, 2026 |
| Yelp |
Return Integers in Descending Ranked Order |
Easy |
Aug 27, 2026 |
| Waymo |
Minimize Total Grid Distance to Every Building |
Hard |
Aug 27, 2026 |
| Palantir |
Apply Item Coupons with Exact Per-Item Cent Rounding |
Medium |
Aug 27, 2026 |
| LinkedIn |
Merge N-ary Trees by Node Key |
Medium |
Aug 27, 2026 |
| IBM |
Minimum Replacements for Adjacent Duplicate Characters |
Medium |
Aug 27, 2026 |
| Amazon / Meta |
Sort Elements by Frequency |
Easy |
Aug 27, 2026 |
| Akuna Capital |
Find the Maximum Value in a Binary Tree Recursively |
Easy |
Aug 26, 2026 |
| Pinterest |
Minimum Transfers Between Pin Boards |
Hard |
Aug 26, 2026 |
| Atlassian |
Highlight the Shortest Unique Substring in Each Label |
Hard |
Aug 26, 2026 |
| Pinterest |
Tree-Encoded Subtree Deletion and Stable Compaction |
Hard |
Aug 26, 2026 |
| Apple |
Sparse Matrix Multiplication (LC 311) |
Medium |
Aug 26, 2026 |
| Meta |
Execute Dependency-Constrained Work at Scale |
Hard |
Aug 25, 2026 |
| Stripe |
Parse and Format Arbitrarily Nested Tasks from CSV |
Hard |
Aug 25, 2026 |
| Microsoft |
Maximize Points by Deleting Values and Their Neighbors |
Medium |
Aug 25, 2026 |
| Apple |
Choose File Storage Tiers Using Access Predictions |
Hard |
Aug 24, 2026 |
| Imc |
Choose Between Two Machines and Allocate Work from Performance Curves |
Hard |
Aug 24, 2026 |
| LinkedIn |
Logistic Regression Debugging |
Hard |
Aug 24, 2026 |
| Salesforce |
Minimum One-Character Word Transformations |
Hard |
Aug 24, 2026 |
| Salesforce |
Find the Celebrity |
Medium |
Aug 24, 2026 |
| Stripe |
Deployment Window Scheduler |
Hard |
Aug 24, 2026 |
| Amazon |
Package Weight Rearrangement |
Medium |
Aug 24, 2026 |
| ByteDance |
Trace and Debug Agent Tool-Call Failures |
Hard |
Aug 23, 2026 |
| ByteDance |
Enumerate All Simple Directed Paths |
Medium |
Aug 23, 2026 |
| ByteDance |
Enumerate All Simple Directed Cycles |
Hard |
Aug 23, 2026 |
| Amazon |
Format a Forest of Nested Comments |
Hard |
Aug 22, 2026 |
| Pinduoduo |
Count Longest Substrings After Character Replacements |
Medium |
Aug 22, 2026 |
| Amazon |
Numbered Buttons with Data Popovers |
Medium |
Aug 22, 2026 |
| Amazon |
Print Hierarchical Comments |
Medium |
Aug 22, 2026 |
| Amazon |
Package Tracking & Status Aggregator Engine |
Easy |
Aug 21, 2026 |
| Amazon |
Minimum-Point Redemption Across Programs |
Hard |
Aug 21, 2026 |
| ByteDance / Ebay / NVIDIA |
Search in Rotated Sorted Array |
Medium |
Aug 21, 2026 |
| Okta |
Evaluate Role-Based Access with Deny Precedence |
Medium |
Aug 20, 2026 |
| ByteDance |
Timestamped Task Scheduler |
Medium |
Aug 20, 2026 |
| Amazon |
Validate Properly Nested Brackets |
Medium |
Aug 19, 2026 |
| Amazon |
Repeat Customer Visits |
Easy |
Aug 19, 2026 |
| Google |
Dependency-Safe Deletion Order |
Hard |
Aug 18, 2026 |
| LinkedIn |
Robot Navigation in an Unknown Grid |
Hard |
Aug 18, 2026 |
| Rippling |
Propagate Task Filtering Through Ancestors |
Hard |
Aug 17, 2026 |
| Roblox |
Piano Keys: Vanilla UI Interaction |
Easy |
Aug 17, 2026 |
| Amazon / ByteDance |
Create Binary Tree from Descriptions (LC 2196) |
Medium |
Aug 17, 2026 |
| ByteDance |
Stickers to Spell Word (LeetCode 691) |
Hard |
Aug 17, 2026 |
| ByteDance |
Pythagorean Triple in an Integer Array |
Medium |
Aug 17, 2026 |
| Sig |
Count Grid Paths with No Three Equal Moves |
Hard |
Aug 16, 2026 |
| Squarepoint |
Concatenate Two C++ Index Sequences at Compile Time |
Medium |
Aug 16, 2026 |
| Squarepoint |
Find a Target Sum Using Two Sorted Arrays |
Medium |
Aug 16, 2026 |
| LinkedIn |
Count Distinct Values in a Massive Sorted Array |
Medium |
Aug 16, 2026 |
| LinkedIn |
Find K Closest Elements in a Sorted Array (LC 658) |
Medium |
Aug 16, 2026 |
| Salesforce |
Valid Word Abbreviation (LeetCode 408) with Follow-Up Variant |
Medium |
Aug 16, 2026 |
| Salesforce |
Lowest Common Ancestor with Parent Pointers (LeetCode 1650) |
Medium |
Aug 16, 2026 |
| Salesforce / Amazon |
Kth Smallest in a BST (LeetCode 230) with Follow-Ups |
Hard |
Aug 16, 2026 |
| DoorDash |
Minimum Parenthesis Deletions |
Easy |
Aug 16, 2026 |
| DoorDash |
First Unique Restaurant in a Stream |
Medium |
Aug 16, 2026 |
| Apple |
Copy List with Random Pointer (LC 138) |
Medium |
Aug 16, 2026 |
| DoorDash |
Minimum Dasher Processing Speed |
Medium |
Aug 16, 2026 |
| Uber |
K Closest Points |
Medium |
Aug 16, 2026 |
| Microsoft / Pinduoduo |
Spiral Matrix (LC 54) + Follow-Ups |
Medium |
Aug 16, 2026 |
| Microsoft |
Palindrome Linked List (LC 234) + Engineering Follow-Up |
Medium |
Aug 16, 2026 |
| Google |
Cutting Ribbons (LC 1891) |
Medium |
Aug 16, 2026 |
| Amazon |
Asteroid Collision (LC 735) |
Medium |
Aug 16, 2026 |
| Google |
Nested List Weight Sum (LC 339) with Follow-Ups |
Medium |
Aug 16, 2026 |
| Microsoft / LinkedIn |
Binary Tree Zigzag Level Order Traversal (LC 103) |
Medium |
Aug 16, 2026 |
| Meta |
Sum Root-to-Leaf Numbers |
Medium |
Aug 16, 2026 |
| OpenAI |
Simulate Infection Spread with Immunity and Recovery |
Hard |
Aug 15, 2026 |
| ByteDance |
Infer an Alien Alphabet from Sorted Words |
Hard |
Aug 15, 2026 |
| C3 AI |
Find the Intersection of Two Linked Chains |
Medium |
Aug 15, 2026 |
| Walmart Labs |
Count Months Whose First Day Is Sunday |
Medium |
Aug 15, 2026 |
| Snowflake |
React / TypeScript Kanban Board |
Medium |
Aug 15, 2026 |
| Citadel |
Task Dependency Ordering |
Medium |
Aug 15, 2026 |
| Microsoft |
Lowest Common Ancestor (LC 235) with a Follow-Up Variant |
Medium |
Aug 15, 2026 |
| Amazon |
Bootstrap Mean & Confidence Interval |
Medium |
Aug 14, 2026 |
| Amazon |
Out-of-Order Package Receiver |
Medium |
Aug 14, 2026 |
| Amazon |
Package Dependency Installation & Build Order |
Medium |
Aug 14, 2026 |
| Amazon |
Group Anagrams (LC 49) |
Medium |
Aug 14, 2026 |
| Google |
Target Expressions from Ordered Digits |
Hard |
Aug 13, 2026 |
| ByteDance / Bobyard |
Build a Nested Comment Tree from Flat Records |
Medium |
Aug 13, 2026 |
| Roblox |
Distinct Cyclic Number Pairs |
Medium |
Aug 12, 2026 |
| Affirm |
Find Redeemable Offers |
Hard |
Aug 12, 2026 |
| Figma |
Sort Documents on a 2D Plane |
Medium |
Aug 12, 2026 |
| Google |
Progressive Array Partitioning |
Hard |
Aug 11, 2026 |
| Microsoft |
Minimum Fuel Cost Across a Road Network |
Hard |
Aug 11, 2026 |
| Oracle |
Two-Value Exchange Warm-Up |
Easy |
Aug 10, 2026 |
| Oracle |
Run-Length String Compression |
Easy |
Aug 10, 2026 |
| Uber |
Minesweeper (LC 529) |
Medium |
Aug 10, 2026 |
| Harvey |
Citation Highlighting |
Medium |
Aug 09, 2026 |
| Affirm |
Aggregate Recent Transactions |
Medium |
Aug 07, 2026 |
| Citadel |
SRE Python Fundamentals — Five-Question Set |
Easy |
Aug 05, 2026 |
| Apple |
Top K Closest Pairs in a Sorted Array |
Hard |
Aug 05, 2026 |
| Figma / Bloomberg / Boston Consulting Group |
Nested String with Brackets Parsing |
Hard |
Aug 04, 2026 |
| Gusto |
Calculate Tax from Progressive Brackets |
Medium |
Aug 01, 2026 |
| Affirm |
Live Fraud Detector |
Easy |
Aug 01, 2026 |
| OpenAI |
Sharded Matmul and Backprop Debugging |
Hard |
Jul 31, 2026 |
| Pinduoduo |
Spiral Matrix Generation |
Medium |
Jul 30, 2026 |
| ByteDance |
Bounded Number Construction from Allowed Digits |
Hard |
Jul 29, 2026 |
| Point72 |
Price Percentile Cutoff |
Medium |
Jul 29, 2026 |
| Point72 |
Optimal Stock Price Subsequence |
Hard |
Jul 29, 2026 |
| Point72 |
League Earnings |
Easy |
Jul 29, 2026 |
| Point72 |
Count Maximum Borrowing Days |
Hard |
Jul 29, 2026 |
| Point72 |
Coins and Energy |
Hard |
Jul 29, 2026 |
| Point72 / Akuna Capital / Google |
Array Frequency Sort |
Easy |
Jul 29, 2026 |
| Microsoft / Amazon / Apple / ByteDance / LinkedIn / Meta / Microsoft AI / Two Sigma / WeRide |
Top K Largest Elements |
Medium |
Jul 29, 2026 |
| Point72 |
Bank Transaction Mining |
Easy |
Jul 29, 2026 |
| Lyft |
Job Scheduler |
Hard |
Jul 29, 2026 |
| Microsoft AI / Microsoft |
Beam Search Decoding |
Hard |
Jul 29, 2026 |
| Apple |
Insert Interval (LC 57) |
Medium |
Jul 28, 2026 |
| Citadel |
Real-Time Trading Event Feed Dashboard (React) |
Medium |
Jul 27, 2026 |
| Apple |
Alias Group Mapping |
Medium |
Jul 27, 2026 |
| Salesforce |
Optimal Account Balancing (LeetCode 465) |
Hard |
Jul 25, 2026 |
| Salesforce |
Delete One Character Type, Minimize Unique-Character Segments |
Medium |
Jul 25, 2026 |
| Google |
Batch and Streaming Log Deduplication |
Hard |
Jul 23, 2026 |
| Amazon |
Word Segmentation with a Dictionary Helper |
Medium |
Jul 22, 2026 |
| Amazon |
Fulfillment-Center Inventory Transfer |
Medium |
Jul 22, 2026 |
| Amazon |
Handwrite Sigmoid, Softmax, and Attention |
Medium |
Jul 20, 2026 |
| Google |
Minimum Direction Violations in a Directed Graph |
Hard |
Jul 19, 2026 |
| Capital One |
W-D-L Outcome Reordering |
Easy |
Jul 19, 2026 |
| Capital One |
Outside-In String Reordering |
Easy |
Jul 19, 2026 |
| Salesforce |
Maximal Rectangle (LeetCode 85) |
Hard |
Jul 17, 2026 |
| Salesforce |
Maximal Square (LeetCode 221) |
Medium |
Jul 17, 2026 |
| Pinduoduo |
Count Longest Increasing Subsequences |
Hard |
Jul 17, 2026 |
| OpenAI |
Maximum Grid Jumping Path |
Hard |
Jul 16, 2026 |
| Vanta |
Task Dependency Resolution (Topological Sort) |
Medium |
Jul 16, 2026 |
| Vanta |
Implement uniq — Unique Lines in a File |
Medium |
Jul 16, 2026 |
| Amazon |
Edit Distance (LC 72) with a Follow-Up Variant |
Hard |
Jul 14, 2026 |
| Google |
Count Word Decompositions into Chemical Element Symbols |
Medium |
Jul 14, 2026 |
| Amazon |
Best Time to Buy & Sell Stock — Merged Variants |
Hard |
Jul 10, 2026 |
| Figma |
Resize Stacked Rectangles — Distribute Height |
Medium |
Jul 09, 2026 |
| Bloomberg |
Detect Duplicate Items Within a 60-Second Sliding Window |
Medium |
Jul 09, 2026 |
| Waymo |
Build an Arithmetic Expression to Reach a Target |
Hard |
Jul 09, 2026 |
| Walmart Labs |
Minimum Talent-Complete Team from Every Start |
Medium |
Jul 07, 2026 |
| Walmart Labs |
Merge Strings Alternately |
Easy |
Jul 07, 2026 |
| Waymo |
Race Car: Minimum Instructions to Reach a Target |
Hard |
Jul 06, 2026 |
| Goldman Sachs |
Highest Average Score Per Person |
Medium |
Jul 06, 2026 |
| SoFi |
Reachable Nodes in a Directed Graph |
Easy |
Jul 04, 2026 |
| Waymo |
Implement Max Pooling with Argmax Coordinates |
Medium |
Jul 02, 2026 |
| Amazon |
Basic Calculator with Postfix Notation |
Medium |
Jul 02, 2026 |
| Amazon |
Closest Version Date |
Medium |
Jul 02, 2026 |
| Google |
Top-K Frequent in Large Logs |
Medium |
Jul 02, 2026 |
| Amazon |
Maximum Concurrent Processes from Intervals |
Medium |
Jul 02, 2026 |
| Google |
Piano Hand Movement Grouping |
Medium |
Jul 01, 2026 |
| Amazon |
Service Shutdown / Topological Sort |
Medium |
Jul 01, 2026 |
| Meta |
Attention Implementation + Flash / Linear Attention Follow-ups |
Hard |
Jun 30, 2026 |
| Amazon |
Drone Delivery on a Hub Ring — Minimum Travel |
Medium |
Jun 30, 2026 |
| Lyft / ByteDance / Meta |
Minimum Window Substring |
Medium |
Jun 29, 2026 |
| Roblox |
Dependency Ordering With Topological Sort |
Hard |
Jun 29, 2026 |
| Databricks |
Find Optimal Commute |
Medium |
Jun 29, 2026 |
| Intuit |
Array Plus One with Large-Input Follow-Up |
Medium |
Jun 28, 2026 |
| Amazon |
Inventory Allocation by Bid Priority |
Medium |
Jun 28, 2026 |
| Meta / ByteDance |
Maximum Unique Character Subset |
Hard |
Jun 28, 2026 |
| Apple / Amazon / Bloomberg / Meta / Uber |
Binary Tree Vertical Order Traversal |
Medium |
Jun 28, 2026 |
| Voleon |
Return Words in Repeated Anagram Groups |
Medium |
Jun 27, 2026 |
| Waymo |
Find Dictionary Words Represented by Repeated Letters |
Medium |
Jun 27, 2026 |
| Waymo |
Find a Repeating Vehicle Program Under Fuel and Memory Limits |
Hard |
Jun 27, 2026 |
| Amazon |
Org-Chart Salary Aggregation |
Medium |
Jun 27, 2026 |
| Amazon |
Find Conflicting Events |
Medium |
Jun 27, 2026 |
| Google |
Website Activity Analytics: Unique Users + Session Time |
Medium |
Jun 26, 2026 |
| Google |
2D Points Connected Components by Radius |
Medium |
Jun 26, 2026 |
| Amazon |
Domain Score Accumulation (Reverse Trie) |
Medium |
Jun 26, 2026 |
| Google |
Meeting Rooms / Interval Scheduling Variants |
Medium |
Jun 26, 2026 |
| ByteDance |
Elements Appearing More Than n/3 in a Sorted Array |
Medium |
Jun 26, 2026 |
| Airbnb |
Fill Layover With Experiences |
Hard |
Jun 26, 2026 |
| ByteDance |
Reverse Nodes in K-Group (incomplete tail variant) |
Medium |
Jun 25, 2026 |
| Okta |
Reverse Substrings Between Each Pair of Parentheses |
Medium |
Jun 24, 2026 |
| ByteDance |
Remove Duplicate Letters for Lexicographically Smallest Result |
Medium |
Jun 24, 2026 |
| Meta / ByteDance / Instacart / Uber |
Basic Calculator I / II |
Medium |
Jun 24, 2026 |
| Apple |
Frontend React Screen |
Hard |
Jun 24, 2026 |
| Snowflake |
Forest Parent Array Delete Node |
Medium |
Jun 24, 2026 |
| Snowflake |
Distributed Tree Node Count |
Medium |
Jun 24, 2026 |
| Stripe |
Six Degrees of Collusion |
Medium |
Jun 24, 2026 |
| JPMorgan |
Zero Compaction Array Coding |
Easy |
Jun 23, 2026 |
| JPMorgan |
Prerequisite Cycle |
Medium |
Jun 23, 2026 |
| JPMorgan |
Interval Consolidation |
Medium |
Jun 23, 2026 |