bytedance 的题目

• Number of Islands and Grid BFS Variants
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• Course Schedule and Topological Sort on a Directed Graph
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• LRU Cache (with TTL and LFU Follow-ups)
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• Reverse Nodes in K-Group (incomplete tail variant)
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• Binary Tree Maximum Path Sum (with path reconstruction)
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• Basic Calculator (with and without parentheses)
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• AI-Assisted Order Validator
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• Bounded Number Construction from Allowed Digits
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• Search in Rotated Sorted Array
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• Longest Repeating Character Replacement
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• Sliding Window Maximum
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• Flatten a Multilevel Doubly Linked List (Skip Empty Nodes)
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• Equalize Root-to-Leaf Path Sums in an N-ary Tree
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• Grid Shortest Path with K Obstacle Eliminations
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• Elements Appearing More Than n/3 in a Sorted Array
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• Longest Zigzag Path in a Grid
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• N-ary Tree Path Sum Count
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• Word Search II with Trie
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• Minimum-Cost Path on a Grid with Fuel and Recharge Cells
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• Longest Substring with At Most K Distinct Characters
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• Reverse Words in a String (Preserve Spaces, In-Place)
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• Photo Groups via Transitive Similarity
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• Binary Tree Right Side View
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• Valid Parentheses with Wildcard '*' and DFS All Strings
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• MinStack, MaxStack and Streaming Median
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• Largest Rectangle in Histogram
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• CodeSignal ML / Research Scientist OA (10-Problem Battery)
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• Contiguous Subarray with Largest Min + Max
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• Subarray Sum Equals K (Count)
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• Longest Substring Without Repeating Characters
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• Merge Intervals
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• Remove Duplicate Letters for Lexicographically Smallest Result
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• Hand-Code Self-Attention and Cross-Entropy
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• CodeSignal SWE OA (Spring 2026 Bank)
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• Longest Palindromic Substring (LeetCode 5)
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• Content Moderation System Design
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• Recent Like Count and Top Posts in a Sliding Window
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• Realtime Auction Bidding System
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• Agent Tool-Use System Design (AML Volcano Engine)
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• ML System Design: Dynamic K in Retrieval Stage
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• Design a Stripe-like Payment Platform
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• Video-Keyword Association Review System
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• Project Deep Dive (Resume Drill)
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• Hiring Manager / Final Behavioral Round
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• MLE Oral 八股: Dropout, Overfitting, Normalization, Loss Functions
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• SRE Linux / Networking Troubleshooting Round
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• RAG / Agent / Kafka Oral Drill
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• CAP / DB Indexing / Concurrency / Logging Oral 八股
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• Build a Nested Comment Tree from a Flat List
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• Course Schedule
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• Add Two Signed Integer Strings
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• Implement an LRU Cache
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• Count Islands and Return the Maximum Island Size
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• Longest Palindromic Substring (Manacher's Algorithm)
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• Longest Palindromic Substring (Manacher's Algorithm)
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• Binary Search
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• Reverse Nodes in k-Group
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• Merge Intervals
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• Largest Number Less Than N Using Allowed Digits
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• Length of Longest Substring Without Repeating Characters
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• Count Subarrays Whose Sum Equals K
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• Merge Intervals
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• Determine Whether an Integer Is a Palindrome
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• Meeting Rooms III
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• Meeting Rooms II
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• Binary Tree Maximum Path Sum
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• In-Memory Key-Value Store with Snapshot and Restore
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• Most Frequent Element with Smallest-Value Tie Break
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• Remove Duplicate Letters
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• Number of Islands and Island Perimeter
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• Number of Islands and Number of Distinct Islands
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• Design Circular Queue
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• Number of Islands with Large Map Follow-up
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• Most Common Suffix / Longest Common Suffix Queries
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• Shortest Path in a Grid with Obstacles Elimination
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• Find Elements Appearing More Than One Third in a Sorted Array
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• Reverse Nodes in k-Group
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• Reverse Linked List
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• Count Number of Nice Subarrays
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• Remove Duplicate Letters
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• Merge Intervals with Possibly Reversed Endpoints
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• Count of Interesting Subarrays
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• Reverse the Order of k-Groups in a Linked List
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• Minimum Jumps to Reach Home
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• Maximum Candies Allocated to K Children
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• Longest Zigzag Path in a Grid
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• Number of Islands
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• LRU Cache with High Cache-Miss Follow-up
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• Reverse Linked List in Groups of K Including the Last Partial Group
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• Print Execution Order in a DAG and Detect Cycles
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• Min Cost to Connect All Points
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• Path Sum III variant on N-ary Tree
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• Task Scheduler-like with Priority Queue
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• Lowest Common Ancestor with Parent Pointers (O(1) extra space)
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• Write a Shell Script (On-site)
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• Delete a length-k subarray to minimize the smallest valid index (sliding window variant)
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• Word Search II (find all words on board)
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• Maximum Candies with At Most Two Types in a Line
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• LRU Cache with TTL Expiration
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• Water Jug: Reachability and Shortest Operation Sequence
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• Concurrency Coding: Implement Thread-Safe Components Using Locks and Atomics
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• Grid/Graph BFS/DFS: Return Distance and the Farthest (Max) Point
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• Move Zeroes
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• Plus One (Array of Digits)
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• Binary Search on a Sorted Array (Find Target)
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• Reverse Nodes in k-Group (reverse even if last group size < k)
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• Best Time to Buy and Sell Stock (with follow-up for multiple transactions)
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• SQL: Longest Consecutive Login Days per User
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• Top-K KOL by Like Count (Heap Optimization)
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• Implement HashMap put/get with Optimal Rehash Strategy
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• Determine Players with Unique Ranks from Match Results (Reachability Counts in a Directed Graph)
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• AI-Native Coding Interview (Round 2)
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• AI-Native Coding Interview (Round 1)
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• Design an LRU Cache
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• Basic Calculator II
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• Add Strings (character array variant)
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• Trie / Prefix Tree Problem (Insufficient Details)
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• LeetCode-Style Coding Problem (Implement and Pass Provided Tests)
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• Alien Dictionary (Order Derivation)
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• Binary Tree Side View Variant
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• Reverse Words in a String (with extra constraints)
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• Convert Between Integer and Roman (Two-Way)
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• Implement an Infix Expression Evaluator (Calculator)
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• Word Ladder (Shortest Transformation Path)
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• Course Schedule (Topological Sort / Cycle Detection)
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• Minimum Cost Path in Grid with Fuel, Blocked Cells, and Recharge Cells
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• Longest Substring with At Most K Distinct Characters
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• Semantic Similarity (Text Embedding + Cosine Similarity)
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• Maximum Product Subarray
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• Minimum Time to Reach Bottom-Right in a Grid
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• Validate and Evaluate a + / - Expression (No Parentheses)
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• Choose k numbers from 1..n without repetition (combinations / permutations)
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• Design a fixed-capacity deque with O(1) operations (including search)
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• Walking with Boost Stations (Greedy Simulation)
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• Count Alternating-Parity Subarrays
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• Aligned Memory Allocator with Alloc/Erase Operations
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• Egg Drop + 3Sum
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• Can Cut All Given Squares From a Rectangle Grid
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• Valid Parentheses
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• Design TinyURL (Encode/Decode with collision handling and optional TTL)
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• Parse Nested ArrayList-like String to Nested List
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• Topological Sort on a Directed Graph
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• Count Different Palindromic Subsequences
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• Subsets II
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• Subsets
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• Reverse Words in a String (variant)
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• Binary Tree Maximum Path Sum (and Print the Path)
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• Regular Expression Matching (., *)
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• Find the Smallest Index to Insert a Value in a Sorted Array
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• Enumerate All Valid Strings After Replacing * in Parentheses
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• Validate Parentheses with Wildcards (*)
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• Classic Island Problem on Grid (BFS/DFS)
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• Subarray / Sliding Window vs Prefix Sum
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• Interval Problem Requiring Sorting by Start (or End)
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• Maximum Subarray Sum
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• House Robber (DP)
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• Binary Tree Right Side View (Build tree + write your own test cases)
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• Longest Palindromic Substring
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• Longest Palindromic Substring
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• Minimum Cost to Reach Last Index (1 or 2 steps)
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• Largest Rectangle Area in Histogram
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• Longest Substring Without Repeating Characters
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• Union Find Problem
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• Number of Islands
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• Modified DFS Problem
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• Construct Binary Tree from Preorder and Inorder Traversal
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• Random Point in Non-overlapping Rectangles
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• Validate Stack Sequences
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• Longest Substring with At Least K Repeating Characters
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• Subset of Videos with Attention Span Constraint
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• Kth Smallest Subarray Sum
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• Implement a Doubly Linked List
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• Find Local Maximums in Temperature Data
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• Longest Repeating Character Replacement
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• Remove All Adjacent Duplicates in String II
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• Currency Conversion
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• House Robber III
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• Maze: BFS Traversal
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• Binary Tree Traversal
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• Reverse Nodes in k-Group
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• Length of Last Word
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• Convert Integer to English Words
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• Longest Substring Without Repeating Characters
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• Soup Servings
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• Reverse Words in a String
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• Add Two Numbers
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• Candy Distribution Problem
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• BST Node Search and Delete
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• 岛屿流向边界
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• Hard dynamic programming problem
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• Medium recommendation system coding problem
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• Flatten HTML Tag
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• Array Partition
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• Maximize Video Watching Time
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• N-Queens Problem
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• Binary Tree Maximum Path Sum
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• Binary Tree Maximum Path Sum
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• Finding the Longest Increasing Subsequence
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• Word Construction from Dictionary
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• Merge k Sorted Lists
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• Basic Calculator without Parentheses
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• Maximum Absolute Difference in Array
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• Calculator with Basic Operations and Parentheses
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• Implement LRU Cache with Time Limit
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• 24 Game
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• Right Side View of Binary Tree
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• Remove Extra Parentheses For Valid String
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• Divide Two Integers
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• LRU Cache
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• Implement Min Heap
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• Count Number of Islands
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• Find the Maximum Distance Between Two Nodes in a Custom Tree
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• 24 Game
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• Data Analysis and Supervised Learning in Jupyter Notebook
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• Maximum Subarray
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• Reverse Words in a Sentence In-Place
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• Find Numbers Occurring More Than N/3 Times
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• Design a 500-Person Group Chat System
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• HTTP Get and Post Differences
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• PyTorch Self-Attention
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• Max Area of Island
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• Number of Islands
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• Leetcode 588 Problem
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• Prefix Sum and Binary Search Problem
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• Multi-source BFS Implementation
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• Jump Game
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• Simulate Promise.all
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• Poor Pigs
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• Merge K Sorted Arrays
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• Binary Tree Diameter
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• Bidirectional Graph Traversal
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• Unique Path Grid with Bit Manipulation
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• Implement Stack Using Linked List
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• Serialize and Deserialize Binary Tree
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• Design and Implement an LRU Cache
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• Implement Moving Average from Data Stream
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• Longest Consecutive Sequence
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• Logistic Regression
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• Max Area of Island
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• Top K Frequent Elements
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• Find Highest Salary In Each Department
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• Subarray with Given Sum
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• Check for Valid Square Formation
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• Plus One
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• Domino and Tromino Tiling
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• Fill NxN Array Based on Coordinate Constraints
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• TikTok Shopping Cost
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• Adjust Video Scores
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• Task Scheduling
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• Count Words
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• Shortest Path in 2D Array with Obstacle Elimination
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• Auto-complete System
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• Countdown Application
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• Trapping Rain Water Variant
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• Find Minimum Window Substring
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• Design System for Processing Different Types of Tickets
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• Dot Product of Two Sparse Vectors
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• Two Sum
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• Spiral Matrix Fill
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• CRUD Operations in Trie
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• Algorithm and Data Structure Challenge
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• Kth Largest Element
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• Word Ladder II And Linked List Cycle II
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• Maximum Path Sum in a Grid
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• Nested Set Equality
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• Shortest Path in Graph
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• Plus One
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• White and Black Stones Game
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• Minimum Semesters to Finish All Courses
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• Content Clustering
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• Viral Campaign
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• Queue and Priority Queue Implementation
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• 求大米
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• Brick Wall
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• Design A Simple LRUCaché
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• Robot Grid Paths
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• Count Number of Islands
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• Implement Power Function
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• Random Sample from Unknown Size Dataset
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• SQL Query Session
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• Find the First Element Greater than K
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• Coin Change
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• Merge k Sorted Lists
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• Dynamic Programming Problem
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• Changing Username Fibonacci Transformation
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• Find and Modify Boundary of a Picture in a Grid
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• String Compression in Kubernetes Style
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• Merge K Sorted Linked Lists into One Sorted List
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• Check if n flowers can be planted without adjacent ones in flowerbed
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• Count Unique Colors After Each Ball Coloring Query
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• Basic Calculator II: Evaluate Expression with +, -, *, / Operators
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• Remove Duplicates from Sorted Linked List
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• Champagne Tower Overflow Amount Calculation
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• Partition Linked List Around Value x Maintaining Original Order
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• Design In-Memory File System with Create and Get Operations
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• Count Valid Strings with No Consecutive Identical Characters
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• Centering a Div in a Web Page: Two Methods Explained
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• Implementing Lazy Loading: Steps, Optimizations, and Performance Issues
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• Equalizing Root-to-Leaf Path Weights in Weighted Trees
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• Merge k Sorted Linked Lists into One Sorted List
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• Binary Tree Level Order Traversal Using BFS
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• SIMD-Based Matrix Multiplication Buffer Implementation Pseudocode
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• O(1) Insert, Remove, and Weighted Random Retrieval Class
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• Find Smallest Missing Positive Integer in Array
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• Real-Time Top-K Most Listened Songs Data Structure Design
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• Maximize User Entertainment with O(n) TikTok Algorithm
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• Validate Binary Search Tree in Binary Tree
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• Find All Continuous Subarrays Summing to Target Value
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• Median of Two Sorted Arrays in O(log(m+n)) Time
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• Longest Palindromic Substring in a Given String
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