google 的题目

• Meeting Rooms / Interval Scheduling Variants
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• Top-K Frequent in Large Logs
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• Trie Prefix Search / Autocomplete
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• OA: Largest Group Sharing a Digit
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• OA: Collect Coins on 1D Board
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• Progressive Array Partitioning
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• Streaming Median (LC 295) with Follow-ups
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• Batch and Streaming Log Deduplication
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• Minimum Direction Violations in a Directed Graph
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• Snake Case to Camel Case with Repository-Wide Refactor
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• Count Word Decompositions into Chemical Element Symbols
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• Robot Status Message Deduplication Window
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• Longest Consecutive Path in Binary Tree
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• Website Activity Analytics: Unique Users + Session Time
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• Active Communication Top Users
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• Streaming Points: Emit K Within Distance
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• First Bad Version with Parallel Search Follow-up
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• Employee Hierarchy Add / Delete
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• Tic-Tac-Toe System with K Players and 3-in-a-Row Win
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• OA: Feature Rollout with Dependency Cycle Detection
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• OA: Email Checksum + Verification-String Lookup
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• Count Perfect Wake Numbers up to N
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• Gate Entry / Exit Time Resolution with Tie-Break Rules
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• Necklace Cut into Two Halves with Equal D/R Counts
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• Fence Painting Minimum Operations (Gemini Team)
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• Gold Chain Split into Two Equal Halves
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• Sum of Good Subarrays (Adjacent Diff ±1)
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• String Decompression with Nested Counts
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• Streaming Insert + Find K-th Largest
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• Restaurant Waitlist: join / delete / find_first_match
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• Google Doc Line Wrap (Word Wrap with Whitespace and Newlines)
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• Run-Length Vector Storage + Dot Product
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• Tree Distance Sum (Re-root DP)
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• Babylon Tile-Stack Merge Game
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• Wordle-Style 5-Letter Minimum-Guess Strategy
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• Two-Day Log Intersection under Memory Limit
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• Find All Bad Pairs Using runTest Oracle
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• Russian Doll Envelopes
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• Rotten Oranges / Multi-Source BFS (taxis)
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• Rotate Any m×n 2D Matrix
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• Jump Game with Profit
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• Shortest Directed Cycle Through a Node
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• 2D Points Connected Components by Radius
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• Number of Islands
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• Decode String
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• Mahjong Winning Hand Detection (14 Tiles)
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• Piano Hand Movement Grouping
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• Path Minimizing the Maximum Cell (Swim in Rising Water)
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• Expression Tree Single-Leaf Mutation
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• Greedy Longest-Match Dictionary Tokenizer
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• Nested Function Expression Evaluator
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• Huffman Tree Construction
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• Compute File System Total Size
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• Matrix Flower Placement with House Adjacency
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• Friend Graph with Timeline (Friend / Unfriend Events)
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• Count Same-Color Squares in Matrix
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• L6 System Design (Staff Loop)
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• ML System Design (Recsys / Chatbot / Image Classifier)
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• Behavioral Round (Googliness Themes)
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• ML Fundamentals Deep Dive (AI/ML & MLE Roles)
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• Google Hiring Assessment (GHA / Work Styles)
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• CPU Architecture and Simulator Design Deep Dive
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• Recursive Variable Substitution with Cycle Detection
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• Tournament Champion Probability
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• Generate Target Expressions with Addition and Multiplication
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• Binary Tree Level Order Traversal
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• Earliest Time When All People Become Connected
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• Partition Numbers by Distinct Frequencies
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• Assign Car Rental Orders to Cars
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• Determine Players with Fixed Rankings
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• Intervals with a Target Meeting Concurrency
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• Car Rental Request Scheduling
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• Count Clusters of 2D Points Within a Radius
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• Number of Islands with Incremental Land Additions
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• Two Sum with Three Sum Follow-up
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• Find Median from Data Stream
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• Decode an Encoded String
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• Permutations II
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• Decode String
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• Split a Log Line by Spaces Outside Quoted Fields
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• Count Rectangle Coverage on a Grid
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• Deduplicating and Sorting Batch and Streaming Logs
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• Validate a Simplified Mahjong Winning Hand
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• Find a Horizontal Cut That Bisects Total Rectangle Area
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• Maximum Assignment Between Problems and Programmers
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• Generate All Strings of Ones and Twos That Sum to N
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• Check Whether a Template Occurs in Leaf Text of a Binary Tree
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• Minimum Direction Violations
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• Streaming Latest-Per-Message Log Processor
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• Keep the Most Recent Log for Each Message
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• Deduplicate and Sort Log Entries
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• Reconstruct the BFS Path Before Reaching a Target
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• Sliding Window Average After Removing the Largest K Values
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• Maximum Overlap of Axis-Aligned Rectangles on a Grid
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• Convert Snake Case to camelCase
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• Count Good Numbers
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• Determine Players with Uniquely Identifiable Ranks
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• Count Spellings of a Word Using Chemical Element Symbols
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• Maximum Area Rectangle From Given Points
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• Schedule Tasks on CPUs and Find the Minimum Number of CPUs
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• Longest Path With the Same Node Value in a Binary Tree
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• Robot Status Message Deduplication
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• Monotone Increasing Digits
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• Minimum Required Safety Value in a Weighted Graph Under a Threshold
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• Longest Consecutive Path in a Binary Tree
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• Top K Frequent Elements
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• Autocomplete Words by Prefix Using Trie
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• Most Frequently Used Rental Car
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• Find Common Available Time Slots in Google Calendar
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• Aggregate Website User Activity and Average Session Duration
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• Count Clusters of 2D Points Within Radius
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• Design and Implement a Simplified CompletableFuture with Parallel Array Splitting
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• First Bad Version with Parallel Bucket Search Follow-up
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• Tokenize Text with Dictionary Using Longest Match
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• Minimum Number of Meeting Rooms
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• Custom Sort String Variant
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• Count Nested Key Pairs and Return Most Frequent Inner Key
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• Consolidate On-call Rotations into Maximal Constant Segments
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• Determine Whether Two Horses Are Related (Pedigree Graph)
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• Longest Increasing Subarray Length; with One Modification Allowed
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• Min Hand Moves to Play a Sequence on a 1..∞ Keyboard (Segment Grouping)
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• Longest Non-Increasing Path in Grid with One-Step Lookback Constraint
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• Implement deleteDirectory with getChildrenPaths and deleteFile APIs
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• Grid Flower Placement with Row/Column Uniqueness and House Adjacency Constraints
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• Detonate Bombs with Chain Reactions (Graph reachability)
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• Evaluate a Nested Math Expression String (add/sub function calls)
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• Design a Tic-Tac-Toe System for k Players on an n×n Board with 3-in-a-Row Win Condition
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• Longest-Match Greedy Tokenization With Dictionary Replacement
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• Build a Huffman Tree From Symbol Frequencies
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• Multi-Elevator Controller: Scheduling and Dispatching
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• Taxi Dispatch (Wrapper around Meeting Rooms II)
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• Count Perfect Wake Numbers ≤ N (Digit DP)
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• Stack problem (details unspecified)
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• Graph problem (details unspecified)
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• Unknown (insufficient details from the interview notes)
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• Determine Passing Order and Crossing Times for People Entering/Exiting a Door
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• Necklace Split with at Most Two Cuts (Equal D and R for Both People)
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• Earliest Time When Everyone Becomes Friends (Union-Find / Graph) + Support Unfriend
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• Minimum Cars to Satisfy Rental Requests + Assignment Records
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• Shortest Path Reachability in a Weighted Graph (with Mandatory Waypoint)
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• Activate Features with Dependency Prerequisites (Simulation)
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• Range Updates Using Difference Array (Template Problem)
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• Maximum Sum Subarray with Equal Endpoints
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• Golden Chain Split After Removing One Link
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• Russian Doll Envelopes (Maximum Nesting)
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• Trie (Prefix Tree) Implementation / Usage
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• Debug Feature Enablement With Dependencies and Constraints
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• Checksum-Based Validation String From Fixed-Length Chunks
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• Group Strings with Same Shift-Distance (Group Shifted Strings)
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• Stuck Keyboard / Jammed String Dictionary Match
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• Friendship Connectivity with Union-Find (+ fully dynamic follow-up)
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• Compute Total Size of a File System (Tree/Graph)
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• Meeting Rooms / Meeting Rooms II (interval scheduling) with large-input follow-up
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• Bucket Sort / Frequency Sorting
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• Meeting Rooms (schedule conflict / minimum rooms)
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• Earliest Time When Everyone Become Friends
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• Maintain manager/peer relationships and answer is_manager queries
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• Implement Binary Search (easy variant)
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• Move Chess Pieces to Match Target (R moves right, L moves left)
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• Count Total Number (or Total Area) of Square Submatrices
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• Chunking with an Unsplittable Header
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• Split Data into Minimum Chunks with Max Chunk Size
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• Belt Packing with 2D Item Sizes (Distance Threshold Triplet)
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• Belt Packing: Return a Triplet When 3 Items Fit a Threshold
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• LRU Cache
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• ML Coding: Implement a Simplified Transformer Forward Pass
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• Reachability with Flight Schedules (Time-Feasible Path)
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• Rotate Any n×m Matrix
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• Find Timed-Out Activities from Logs (OO Design)
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• Count the Number of Lakes Within the Island Containing a Given Cell
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• Count the Number of Shortest Paths Between Two Nodes in an Undirected Graph
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• Expression Add Operators (Hard) - Variant
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• Count Connected Building Communities in a Grid
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• Subarray Sum Equals K (with streaming-data follow-up)
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• Intersection of Two Family Chains (find common ancestor/member)
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• Subtract Two Numeric Strings (Big Integer Subtraction)
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• Morse Code Decoding (count or enumerate all decodings)
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• Onsite Coding: 2D DP (optimized to 1D) + Union-Find / Graph Search
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• Maximum size subset of two-digit numbers sharing a common digit
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• Max Coins with Tokens Moving +3 (No Collisions)
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• Minimum Racks to Pack Machines with Two Resource Constraints
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• Depth-First Search (DFS) Coding Problem
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• Find All Words With Given Prefix
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• Mahjong Hand Winning Check (14 Tiles)
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• Check Whether All Subsequences of Length ≥ 3 Can Be Rearranged Into a Valid Dictionary Word (Anagram Check)
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• Check Whether All Subsequences of Length ≥ 3 Are Valid Dictionary Words
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• Probability to Hit a Target Interval on an Infinite 1D Grid with Dice Steps
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• Design FancySet with O(1) add/delete/getRandom
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• Reachability Under Distance Threshold (Implicit Graph via getDistance)
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• Largest Group of Two-Digit Numbers Sharing at Least One Digit
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• Max Coins Collected by Tokens Moving Exactly 3 Steps Right on a 1D Board
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• Find All People Who Learn a Secret After Meetings
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• Max Points With Non-Adjacent Picks (House Robber variant)
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• Convert Reverse Polish Notation to Infix Expression (Minimal Parentheses)
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• Restaurant Waitlist System (Add Party & Allocate Table)
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• Group Strings by Relative Character Shifts (Distance Signature)
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• Sum of all good subarrays with adjacent difference ±1
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• Minimum Number of 1×m or 1×n Boards to Patch Holes on an m×n Roof Grid
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• Make First k Elements of Two Lists Disjoint by Deleting from the Second List
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• String decompression with nested parentheses and repetition counts
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• Data structure with insert() and findLargest(k) for k-th largest (with duplicates)
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• Validate Tree Given Parent Array
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• Remove Exactly One Element to Make a Pivot Index Exist
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• Minimum Number of Servers for Tasks on a 24-hour Cycle (Wrap-around Allowed)
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• Implement LFU Cache
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• Hackerrank Coding - Minimum Operations to Reduce an Integer to 0
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• Binary Search on Answer: Minimum Workers to Achieve Target Efficiency
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• Interactive guessing with feedback (Guess the Word)
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• Build a relationship graph and run BFS to answer queries
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• Robot Transformation
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• Find the cheapest common ancestor for two nodes in a tree
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• Build Graph using BFS
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• Meeting Room II
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• Find k subsets with sum of weights in decreasing order
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• Word Prediction System
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• Shortest Distance to Taxi in a Grid
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• Signal Propagation in Graph
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• Grid Path Cost
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• Tree Distance Sum
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• Online Assessment for software engineering role
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• Match Binary Signal to Pattern
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• Find the pair of test cases causing a failure
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• Dynamic Programming Question
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• Subset with duplicates
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• Subset (without duplicate)
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• Determine if two chickens have a familial relationship
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• Minimize Maximum Height in Path
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• Cyclic Meeting Rooms Calculation
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• Implement Trie with Add and Search Word
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• Variant of Number of Islands
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• Implement an iterator that merges favorites and photos lists
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• Find the Longest Increasing Subarray with Replacement Option
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• Super Streak Detection in Event Sequences
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• Shortest Path in Weighted Directed Graph
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• Meeting Rooms Problem
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• Design a Poker Game
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• Babylon Game Simulation
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• Find the Longest Subarray with a Given Mean
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• Design a Timer Class
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• Equal Division of Square Area
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• Design Bookshelf Class
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• Maximum Two-Digit Number Group Selection
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• Maximum Coins on a Board
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• Find Numbers Expressed as Sum of Two Squares
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• Sliding Window with Exclusions
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• Mode of Trinary Tree
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• Maximize Group Size with Shared Digits
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• Maximize Coins Collection
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• Number of Islands
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• Maximum Profit from Array
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• Decode String
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• Maximum Related Numbers
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• Collect Maximum Coins
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• Subarray Sum Equals K
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• Shortest Path in Graph for Two Nodes
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• Meeting Rooms II
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• Modified Course Schedule
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• Reverse Coin Change
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• Binary Tree Level Order Traversal
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• LRU Cache Variation
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• Shuffle a Deck with Random Function
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• Find Maximum in Large File
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• Find Longest Duplicate Substring
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• Dynamic Programming Problems
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• Minimum Cars Required for Rentals
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• Unique Paths in a 2D Matrix with Moves
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• Find Top K Users by Chat Logs
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• Add Two Large Numbers
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• Group Array
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• Collect Token
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• Graph Problem with Weighted Edge Follow-up
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• Pattern Matcher with Dictionary Substitution
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• Find Maximum Expression from Subarray
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• Modified Meeting Rooms
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• Log File Intersection
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• Count Colorful Squares
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• Safe Travel Ranges
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• Find K Pairs with Smallest Sums
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• Binary Tree Right Side View
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• Delivery Routes
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• Top K Movie Recommendations
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• Design Restaurant Waitlist
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• Serialize and Deserialize List of Strings
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• Find Maximum Subarray Sum Between Equal Elements
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• String Word Break
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• Meeting Rooms Optimization
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• Largest Group of Same Digit Integers
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• Collect Maximum C's
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• Binary Tree Level Order Stream Iterator
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• Maximum Coins Eaten
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• Class with Find, Fill, and Delete Operations
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• Max Elements Sharing Same Digits in a List
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• Single Player Game on a One-Dimensional Board
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• Largest Group by Digit
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• Maximize Coins Collection
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• Find Nearest Favorite City
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• Apartment Allocation Problem
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• Lowest Common Ancestor of a Tree
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• Two-Digit Number Shared Digits Count
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• Coin Collection with Right Steps
  类型：online_judge
• Water Container Optimization
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• Extract Nodes from Linked List
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• Minimum Absolute Sum
  类型：online_judge
• Split and Sort Array
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• Array Transformation
  类型：online_judge
• Min Absolute Sum
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• Split and Sort
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• Dijkstra's Algorithm Implementation
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• Single Person Time Period from Intervals
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• CoolMap Interface with Constant Time putAll
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• Count Number of Islands in List of Linked Lists
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• Action Sequence Streak
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• Find Maximum Profit from Stock Price List
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• LRU Cache Implementation
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• Apartment Assignment Problem
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• Find First Greater or Equal Element
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• Minimum Distance Between People and Cakes
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• Refactoring Exercise
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• Heap Problem
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• Stream String Checker
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• Find Missing Numbers with Range Replace
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• Remove Duplicates in Order
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• Basic Calculator
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• Form Word in Given Steps
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• Restaurant Waitlist System
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• Modified Course Schedule
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• R dplyr Application: Sample and Join
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• Predict Smartphone Battery Life
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• Merge Intervals
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• Squares of a Sorted Array
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• Rearrange Array to Avoid Any Median
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• Convolution Implementation and Parallelism
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• Real-time detection of party events in a data stream
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• Find the Longest Continuous Line of Same Color in a Bitmap
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• Rearrange Array to Place Even Numbers Before Odd Numbers
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• General DFS Problem
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• Optimal File Distribution in a Data Center
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• STAR Method Behavioral Interview Response Guide
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• Count Number of Islands in 2D Grid
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• Check if all array elements occur more than k times
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• Split Array into Consecutive Subsequences of Length Five
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• Valid Palindrome Check Ignoring Non-Alphanumeric Characters
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• Path Exists from Start to Target via Cells with Value k
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• Rearrange Array to Avoid Prime Sums of Adjacent Elements
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• Least Probability Path in Grid with Catch Risks
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• Group Elements by Equality Function or Common Value
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• Tree Node and Subtree Deletion by Index
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• Largest Leaf Path Value Dictionary from Binary Tree Nodes
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• AI/ML Model Trainer: Initialization, Training, Evaluation Class
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• Maximize Score by Pairing Adjacent Characters and Numbers
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• Count Four-Digit Numbers Summing to Target Value
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• Understanding Probability Density Functions and Values Greater Than One
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• Supervised vs Unsupervised Learning and Benefits of Self-supervised Learning
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• Count 4-Digit Codes with Digit Sum Equal to S
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• Calculate Total Score from Points and Adjacent Tokens
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• Calculate Total Score with Points and Adjacent 'T's Bonus
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• Count Combinations of Four Digits Summing to Target
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• Largest Number Subsequences of K Digits from Sequence
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• Count Four-Digit Numbers With Digit Sum S
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• Count Four-Digit Combinations with Given Digit Sum
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• Calculate Score With Points and Consecutive 'T' Bonuses
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• Count Four-Digit Codes with Digit Sum Equal to S Using DP
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• Detect Path A to B(s) to C in Directed Graph
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• Importance of Personality Traits in Workplace Success
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• Count Four-Digit Numbers with Digit Sum Equal to s
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• Replace first duplicate with sum and remove others in-place
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• Count All Paths Between Two Digits in 3x3 Grid (with/without Diagonals)
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• Work Schedule Segmentation with Employee Overlaps
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• Ads Scheduler with Decreasing Scores and Non-Consecutive Repeats
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• Find Most Frequent Next Word After Given Word in Sentences
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• Calculate Lines Needed for Sentence Wrapping with Width Constraints
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