Information
Right now I work in Google and would like to give reference for job application. Please send the CV to my email address [email protected].
Unsubscribed the Leetocode membership so this repo is valid until 04/2018
Leetcode Company Tag
There is the collection of each company's tag questions on Leetcode. Welcome to contribute other company's questions based on this format.
Table of Company
To be Continue
-Facebook
-Google
-Uber
-Bloomberg
-Microsoft
-Amazon
-Linkedin
| Title | Acceptance | Difficulty | Frequency |
|---|---|---|---|
| 534 | Design TinyURL | 0.0% | Medium |
| 283 | Move Zeroes | 50.7% | Easy |
| 301 | Remove Invalid Parentheses | 35.5% | Hard |
| 273 | Integer to English Words | 22.4% | Hard |
| 621 | Task Scheduler | 42.2% | Medium |
| 67 | Add Binary | 33.2% | Easy |
| 689 | Maximum Sum of 3 Non-Overlapping Subarrays | 41.3% | Hard |
| 325 | Maximum Size Subarray Sum Equals k | 43.0% | Medium |
| 253 | Meeting Rooms II | 39.3% | Medium |
| 17 | Letter Combinations of a Phone Number | 35.4% | Medium |
| 91 | Decode Ways | 20.0% | Medium |
| 311 | Sparse Matrix Multiplication | 51.8% | Medium |
| 314 | Binary Tree Vertical Order Traversal | 37.3% | Medium |
| 297 | Serialize and Deserialize Binary Tree | 34.0% | Hard |
| 10 | Regular Expression Matching | 24.3% | Hard |
| 15 | 3Sum | 21.8% | Medium |
| 158 | Read N Characters Given Read4 II - Call multiple times | 24.5% | Hard |
| 277 | Find the Celebrity | 35.6% | Medium |
| 278 | First Bad Version | 25.8% | Easy |
| 200 | Number of Islands | 35.6% | Medium |
| 76 | Minimum Window Substring | 26.1% | Hard |
| 257 | Binary Tree Paths | 39.7% | Easy |
| 543 | Diameter of Binary Tree | 44.7% | Easy |
| 157 | Read N Characters Given Read4 | 29.2% | Easy |
| 282 | Expression Add Operators | 30.2% | Hard |
| 23 | Merge k Sorted Lists | 27.7% | Hard |
| 173 | Binary Search Tree Iterator | 42.4% | Medium |
| 121 | Best Time to Buy and Sell Stock | 42.1% | Easy |
| 211 | Add and Search Word - Data structure design | 24.1% | Medium |
| 56 | Merge Intervals | 31.0% | Medium |
| 1 | Two Sum | 36.1% | Easy |
| 125 | Valid Palindrome | 26.6% | Easy |
| 161 | One Edit Distance | 31.6% | Medium |
| 597 | Friend Requests I: Overall Acceptance Rate | 37.3% | Easy |
| 252 | Meeting Rooms | 48.3% | Easy |
| 341 | Flatten Nested List Iterator | 42.2% | Medium |
| 285 | Inorder Successor in BST | 36.3% | Medium |
| 98 | Validate Binary Search Tree | 23.8% | Medium |
| 43 | Multiply Strings | 27.6% | Medium |
| 78 | Subsets | 42.5% | Medium |
| 602 | Friend Requests II: Who Has the Most Friends | 41.3% | Medium |
| 139 | Word Break | 30.8% | Medium |
| 670 | Maximum Swap | 38.3% | Medium |
| 57 | Insert Interval | 28.3% | Hard |
| 215 | Kth Largest Element in an Array | 39.9% | Medium |
| 75 | Sort Colors | 38.4% | Medium |
| 133 | Clone Graph | 25.1% | Medium |
| 680 | Valid Palindrome II | 32.2% | Easy |
| 33 | Search in Rotated Sorted Array | 32.0% | Medium |
| 238 | Product of Array Except Self | 49.8% | Medium |
| 636 | Exclusive Time of Functions | 43.9% | Medium |
| 88 | Merge Sorted Array | 32.1% | Easy |
| 206 | Reverse Linked List | 46.1% | Easy |
| 79 | Word Search | 27.4% | Medium |
| 13 | Roman to Integer | 46.8% | Easy |
| 236 | Lowest Common Ancestor of a Binary Tree | 30.0% | Medium |
| 146 | LRU Cache | 18.7% | Hard |
| 494 | Target Sum | 43.6% | Medium |
| 523 | Continuous Subarray Sum | 23.2% | Medium |
| 477 | Total Hamming Distance | 47.7% | Medium |
| 642 | Design Search Autocomplete System | 30.7% | Hard |
| 38 | Count and Say | 35.7% | Easy |
| 554 | Brick Wall | 46.1% | Medium |
| 398 | Random Pick Index | 43.9% | Medium |
| 218 | The Skyline Problem | 28.2% | Hard |
| 49 | Group Anagrams | 36.4% | Medium |
| 286 | Walls and Gates | 44.8% | Medium |
| 209 | Minimum Size Subarray Sum | 31.4% | Medium |
| 208 | Implement Trie (Prefix Tree) | 29.5% | Medium |
| 102 | Binary Tree Level Order Traversal | 41.0% | Medium |
| 71 | Simplify Path | 25.8% | Medium |
| 20 | Valid Parentheses | 33.7% | Easy |
| 28 | Implement strStr() | 28.6% | Easy |
| 90 | Subsets II | 37.2% | Medium |
| 128 | Longest Consecutive Sequence | 37.5% | Hard |
| 127 | Word Ladder | 19.7% | Medium |
| 377 | Combination Sum IV | 42.4% | Medium |
| 380 | Insert Delete GetRandom O(1) | 39.4% | Medium |
| 44 | Wildcard Matching | 20.6% | Hard |
| 334 | Increasing Triplet Subsequence | 39.8% | Medium |
| 269 | Alien Dictionary | 25.2% | Hard |
| 639 | Decode Ways II | 24.3% | Hard |
| 461 | Hamming Distance | 69.8% | Easy |
| 235 | Lowest Common Ancestor of a Binary Search Tree | 39.5% | Easy |
| 674 | Longest Continuous Increasing Subsequence | 42.9% | Easy |
| 647 | Palindromic Substrings | 55.7% | Medium |
| 117 | Populating Next Right Pointers in Each Node II | 33.8% | Medium |
| 50 | Pow(x, n) | 26.0% | Medium |
| 85 | Maximal Rectangle | 28.8% | Hard |
| 69 | Sqrt(x) | 28.2% | Easy |
| 68 | Text Justification | 19.6% | Hard |
| 210 | Course Schedule II | 29.1% | Medium |
| 26 | Remove Duplicates from Sorted Array | 35.5% | Easy |
| 221 | Maximal Square | 29.6% | Medium |
| 274 | H-Index | 33.5% | Medium |
| 404 | Sum of Left Leaves | 47.3% | Easy |
| 25 | Reverse Nodes in k-Group | 31.1% | Hard |
| 234 | Palindrome Linked List | 33.1% | Easy |
| 168 | Excel Sheet Column Title | 26.7% | Easy |
| 261 | Graph Valid Tree | 38.1% | Medium |
| 410 | Split Array Largest Sum | 38.6% | Hard |
| 525 | Contiguous Array | 40.9% | Medium |
| 535 | Encode and Decode TinyURL | 74.2% | Medium |
| 572 | Subtree of Another Tree | 40.6% | Easy |
| 265 | Paint House II | 38.1% | Hard |
| 714 | Best Time to Buy and Sell Stock with Transaction Fee | 39.4% | Medium |
| 578 | Get Highest Answer Rate Question | 28.1% | Medium |
| 637 | Average of Levels in Binary Tree | 55.6% | Easy |
| 721 | Accounts Merge | 27.4% | Medium |
| 653 | Two Sum IV - Input is a BST | 50.4% | Easy |
| 673 | Number of Longest Increasing Subsequence | 31.2% | Medium |
| 80 | Remove Duplicates from Sorted Array II | 36.4% | Medium |
| 275 | H-Index II | 34.7% | Medium |
| Title | Acceptance | Difficulty | Frequency |
|---|---|---|---|
| 534 | Design TinyURL | 0.0% | Medium |
| 388 | Longest Absolute File Path | 37.1% | Medium |
| 683 | K Empty Slots | 36.6% | Hard |
| 681 | Next Closest Time | 42.9% | Medium |
| 340 | Longest Substring with At Most K Distinct Characters | 39.2% | Hard |
| 482 | License Key Formatting | 41.8% | Medium |
| 308 | Range Sum Query 2D - Mutable | 24.1% | Hard |
| 346 | Moving Average from Data Stream | 59.5% | Easy |
| 298 | Binary Tree Longest Consecutive Sequence | 41.4% | Medium |
| 418 | Sentence Screen Fitting | 27.8% | Medium |
| 281 | Zigzag Iterator | 51.4% | Medium |
| 425 | Word Squares | 43.5% | Hard |
| 361 | Bomb Enemy | 39.4% | Medium |
| 394 | Decode String | 41.7% | Medium |
| 393 | UTF-8 Validation | 34.7% | Medium |
| 568 | Maximum Vacation Days | 39.1% | Hard |
| 163 | Missing Ranges | 23.8% | Medium |
| 66 | Plus One | 39.1% | Easy |
| 686 | Repeated String Match | 32.9% | Easy |
| 351 | Android Unlock Patterns | 44.3% | Medium |
| 317 | Shortest Distance from All Buildings | 34.4% | Hard |
| 271 | Encode and Decode Strings | 26.2% | Medium |
| 289 | Game of Life | 37.1% | Medium |
| 288 | Unique Word Abbreviation | 17.3% | Medium |
| 305 | Number of Islands II | 39.3% | Hard |
| 200 | Number of Islands | 35.6% | Medium |
| 280 | Wiggle Sort | 57.9% | Medium |
| 616 | Add Bold Tag in String | 38.7% | Medium |
| 259 | 3Sum Smaller | 41.7% | Medium |
| 218 | The Skyline Problem | 28.2% | Hard |
| 399 | Evaluate Division | 41.5% | Medium |
| 159 | Longest Substring with At Most Two Distinct Characters | 41.9% | Hard |
| 246 | Strobogrammatic Number | 40.0% | Easy |
| 329 | Longest Increasing Path in a Matrix | 36.9% | Hard |
| 417 | Pacific Atlantic Water Flow | 34.1% | Medium |
| 406 | Queue Reconstruction by Height | 56.2% | Medium |
| 279 | Perfect Squares | 37.5% | Medium |
| 345 | Reverse Vowels of a String | 38.7% | Easy |
| 56 | Merge Intervals | 31.0% | Medium |
| 687 | Longest Univalue Path | 33.3% | Easy |
| 284 | Peeking Iterator | 35.5% | Medium |
| 247 | Strobogrammatic Number II | 40.5% | Medium |
| 524 | Longest Word in Dictionary through Deleting | 43.3% | Medium |
| 471 | Encode String with Shortest Length | 42.8% | Hard |
| 228 | Summary Ranges | 30.8% | Medium |
| 391 | Perfect Rectangle | 27.1% | Hard |
| 407 | Trapping Rain Water II | 37.6% | Hard |
| 286 | Walls and Gates | 44.8% | Medium |
| 362 | Design Hit Counter | 54.4% | Medium |
| 297 | Serialize and Deserialize Binary Tree | 34.0% | Hard |
| 294 | Flip Game II | 46.6% | Medium |
| 146 | LRU Cache | 18.7% | Hard |
| 380 | Insert Delete GetRandom O(1) | 39.4% | Medium |
| 276 | Paint Fence | 34.7% | Easy |
| 401 | Binary Watch | 44.9% | Easy |
| 295 | Find Median from Data Stream | 28.0% | Hard |
| 249 | Group Shifted Strings | 42.7% | Medium |
| 463 | Island Perimeter | 57.5% | Easy |
| 42 | Trapping Rain Water | 37.2% | Hard |
| 320 | Generalized Abbreviation | 45.5% | Medium |
| 505 | The Maze II | 38.2% | Medium |
| 341 | Flatten Nested List Iterator | 42.2% | Medium |
| 266 | Palindrome Permutation | 57.5% | Easy |
| 315 | Count of Smaller Numbers After Self | 34.8% | Hard |
| 360 | Sort Transformed Array | 44.5% | Medium |
| 411 | Minimum Unique Word Abbreviation | 33.3% | Hard |
| 269 | Alien Dictionary | 25.2% | Hard |
| 239 | Sliding Window Maximum | 33.6% | Hard |
| 389 | Find the Difference | 51.0% | Easy |
| 465 | Optimal Account Balancing | 37.8% | Hard |
| 274 | H-Index | 33.5% | Medium |
| 253 | Meeting Rooms II | 39.3% | Medium |
| 128 | Longest Consecutive Sequence | 37.5% | Hard |
| 20 | Valid Parentheses | 33.7% | Easy |
| 158 | Read N Characters Given Read4 II - Call multiple times | 24.5% | Hard |
| 293 | Flip Game | 56.5% | Easy |
| 139 | Word Break | 30.8% | Medium |
| 415 | Add Strings | 41.5% | Easy |
| 359 | Logger Rate Limiter | 60.1% | Easy |
| 230 | Kth Smallest Element in a BST | 44.5% | Medium |
| 162 | Find Peak Element | 38.1% | Medium |
| 270 | Closest Binary Search Tree Value | 40.1% | Easy |
| 23 | Merge k Sorted Lists | 27.7% | Hard |
| 498 | Diagonal Traverse | 46.1% | Medium |
| 400 | Nth Digit | 30.1% | Easy |
| 490 | The Maze | 43.2% | Medium |
| 318 | Maximum Product of Word Lengths | 44.9% | Medium |
| 10 | Regular Expression Matching | 24.3% | Hard |
| 212 | Word Search II | 24.0% | Hard |
| 240 | Search a 2D Matrix II | 38.8% | Medium |
| 373 | Find K Pairs with Smallest Sums | 30.9% | Medium |
| 4 | Median of Two Sorted Arrays | 22.3% | Hard |
| 369 | Plus One Linked List | 54.8% | Medium |
| 422 | Valid Word Square | 36.4% | Easy |
| 251 | Flatten 2D Vector | 40.9% | Medium |
| 332 | Reconstruct Itinerary | 29.4% | Medium |
| 173 | Binary Search Tree Iterator | 42.4% | Medium |
| 155 | Min Stack | 29.7% | Easy |
| 358 | Rearrange String k Distance Apart | 31.7% | Hard |
| 54 | Spiral Matrix | 26.6% | Medium |
| 587 | Erect the Fence | 32.6% | Hard |
| 679 | 24 Game | 38.9% | Hard |
| 140 | Word Break II | 23.9% | Hard |
| 324 | Wiggle Sort II | 26.2% | Medium |
| 17 | Letter Combinations of a Phone Number | 35.4% | Medium |
| 484 | Find Permutation | 55.1% | Medium |
| 562 | Longest Line of Consecutive One in Matrix | 40.9% | Medium |
| 166 | Fraction to Recurring Decimal | 17.8% | Medium |
| 22 | Generate Parentheses | 46.3% | Medium |
| 409 | Longest Palindrome | 45.5% | Easy |
| 224 | Basic Calculator | 27.8% | Hard |
| 31 | Next Permutation | 28.8% | Medium |
| 676 | Implement Magic Dictionary | 50.0% | Medium |
| 327 | Count of Range Sum | 30.1% | Hard |
| 421 | Maximum XOR of Two Numbers in an Array | 46.9% | Medium |
| 57 | Insert Interval | 28.3% | Hard |
| 503 | Next Greater Element II | 47.3% | Medium |
| 336 | Palindrome Pairs | 26.6% | Hard |
| 684 | Redundant Connection | 39.2% | Medium |
| 133 | Clone Graph | 25.1% | Medium |
| 44 | Wildcard Matching | 20.6% | Hard |
| 50 | Pow(x, n) | 26.0% | Medium |
| 543 | Diameter of Binary Tree | 44.7% | Easy |
| 460 | LFU Cache | 24.4% | Hard |
| 231 | Power of Two | 40.4% | Easy |
| 208 | Implement Trie (Prefix Tree) | 29.5% | Medium |
| 363 | Max Sum of Rectangle No Larger Than K | 33.4% | Hard |
| 354 | Russian Doll Envelopes | 32.3% | Hard |
| 348 | Design Tic-Tac-Toe | 45.8% | Medium |
| 652 | Find Duplicate Subtrees | 35.8% | Medium |
| 444 | Sequence Reconstruction | 19.6% | Medium |
| 309 | Best Time to Buy and Sell Stock with Cooldown | 41.3% | Medium |
| 501 | Find Mode in Binary Search Tree | 37.7% | Easy |
| 382 | Linked List Random Node | 47.1% | Medium |
| 402 | Remove K Digits | 26.0% | Medium |
| 370 | Range Addition | 56.5% | Medium |
| 272 | Closest Binary Search Tree Value II | 39.4% | Hard |
| 475 | Heaters | 29.6% | Easy |
| 214 | Shortest Palindrome | 24.7% | Hard |
| 551 | Student Attendance Record I | 44.1% | Easy |
| 377 | Combination Sum IV | 42.4% | Medium |
| 282 | Expression Add Operators | 30.2% | Hard |
| 302 | Smallest Rectangle Enclosing Black Pixels | 45.9% | Hard |
| 379 | Design Phone Directory | 34.1% | Medium |
| 353 | Design Snake Game | 26.8% | Medium |
| 375 | Guess Number Higher or Lower II | 35.9% | Medium |
| 459 | Repeated Substring Pattern | 38.2% | Easy |
| 356 | Line Reflection | 30.1% | Medium |
| 261 | Graph Valid Tree | 38.1% | Medium |
| 486 | Predict the Winner | 45.1% | Medium |
| 542 | 01 Matrix | 33.0% | Medium |
| 397 | Integer Replacement | 30.2% | Medium |
| 321 | Create Maximum Number | 24.8% | Hard |
| 408 | Valid Word Abbreviation | 28.2% | Easy |
| 368 | Largest Divisible Subset | 33.7% | Medium |
| 378 | Kth Smallest Element in a Sorted Matrix | 45.2% | Medium |
| 530 | Minimum Absolute Difference in BST | 47.1% | Easy |
| 313 | Super Ugly Number | 38.0% | Medium |
| 331 | Verify Preorder Serialization of a Binary Tree | 36.6% | Medium |
| 323 | Number of Connected Components in an Undirected Graph | 48.3% | Medium |
| 451 | Sort Characters By Frequency | 51.1% | Medium |
| 374 | Guess Number Higher or Lower | 35.9% | Easy |
| 448 | Find All Numbers Disappeared in an Array | 51.2% | Easy |
| 310 | Minimum Height Trees | 28.9% | Medium |
| 326 | Power of Three | 40.4% | Easy |
| 257 | Binary Tree Paths | 39.7% | Easy |
| 520 | Detect Capital | 51.9% | Easy |
| 729 | My Calendar I | 36.1% | Medium |
| 469 | Convex Polygon | 33.4% | Medium |
| 474 | Ones and Zeroes | 39.1% | Medium |
| 480 | Sliding Window Median | 31.1% | Hard |
| 481 | Magical String | 45.6% | Medium |
| 483 | Smallest Good Base | 33.4% | Hard |
| 485 | Max Consecutive Ones | 54.0% | Easy |
| 312 | Burst Balloons | 43.2% | Hard |
| 314 | Binary Tree Vertical Order Traversal | 37.3% | Medium |
| 357 | Count Numbers with Unique Digits | 46.1% | Medium |
| 487 | Max Consecutive Ones II | 45.6% | Medium |
| 493 | Reverse Pairs | 20.6% | Hard |
| 494 | Target Sum | 43.6% | Medium |
| 506 | Relative Ranks | 46.6% | Easy |
| 514 | Freedom Trail | 39.1% | Hard |
| 447 | Number of Boomerangs | 45.7% | Easy |
| 521 | Longest Uncommon Subsequence I | 55.9% | Easy |
| 522 | Longest Uncommon Subsequence II | 31.8% | Medium |
| 526 | Beautiful Arrangement | 54.2% | Medium |
| 527 | Word Abbreviation | 41.9% | Hard |
| 316 | Remove Duplicate Letters | 29.9% | Hard |
| 531 | Lonely Pixel I | 55.6% | Medium |
| 533 | Lonely Pixel II | 44.6% | Medium |
| 535 | Encode and Decode TinyURL | 74.2% | Medium |
| 541 | Reverse String II | 43.7% | Easy |
| 330 | Patching Array | 32.3% | Hard |
| 544 | Output Contest Matches | 70.9% | Medium |
| 545 | Boundary of Binary Tree | 31.9% | Medium |
| 549 | Binary Tree Longest Consecutive Sequence II | 41.9% | Medium |
| 552 | Student Attendance Record II | 31.3% | Hard |
| 560 | Subarray Sum Equals K | 40.4% | Medium |
| 569 | Median Employee Salary | 34.2% | Hard |
| 581 | Shortest Unsorted Continuous Subarray | 29.3% | Easy |
| 583 | Delete Operation for Two Strings | 44.2% | Medium |
| 604 | Design Compressed String Iterator | 32.5% | Easy |
| 638 | Shopping Offers | 43.4% | Medium |
| 643 | Maximum Average Subarray I | 37.8% | Easy |
| 644 | Maximum Average Subarray II | 23.0% | Hard |
| 651 | 4 Keys Keyboard | 48.8% | Medium |
| 656 | Coin Path | 25.1% | Hard |
| 657 | Judge Route Circle | 68.6% | Easy |
| 658 | Find K Closest Elements | 35.3% | Medium |
| 659 | Split Array into Consecutive Subsequences | 35.7% | Medium |
| 665 | Non-decreasing Array | 21.1% | Easy |
| 667 | Beautiful Arrangement II | 51.5% | Medium |
| 668 | Kth Smallest Number in Multiplication Table | 37.7% | Hard |
| 685 | Redundant Connection II | 28.4% | Hard |
| 689 | Maximum Sum of 3 Non-Overlapping Subarrays | 41.3% | Hard |
| 719 | Find K-th Smallest Pair Distance | 25.3% | Hard |
| 726 | Number of Atoms | 45.7% | Hard |
| 727 | Minimum Window Subsequence | 29.1% | Hard |
| 731 | My Calendar II | 31.6% | Medium |
Uber
| Title | Acceptance | Difficulty | Frequency |
|---|---|---|---|
| 534 | Design TinyURL | 0.0% | Medium |
| 380 | Insert Delete GetRandom O(1) | 39.4% | Medium |
| 291 | Word Pattern II | 38.1% | Hard |
| 262 | Trips and Users | 18.1% | Hard |
| 254 | Factor Combinations | 43.2% | Medium |
| 36 | Valid Sudoku | 36.5% | Medium |
| 297 | Serialize and Deserialize Binary Tree | 34.0% | Hard |
| 636 | Exclusive Time of Functions | 43.9% | Medium |
| 139 | Word Break | 30.8% | Medium |
| 432 | All O`one Data Structure | 28.1% | Hard |
| 146 | LRU Cache | 18.7% | Hard |
| 692 | Top K Frequent Words | 40.6% | Medium |
| 17 | Letter Combinations of a Phone Number | 35.4% | Medium |
| 49 | Group Anagrams | 36.4% | Medium |
| 648 | Replace Words | 47.3% | Medium |
| 249 | Group Shifted Strings | 42.7% | Medium |
| 22 | Generate Parentheses | 46.3% | Medium |
| 54 | Spiral Matrix | 26.6% | Medium |
| 133 | Clone Graph | 25.1% | Medium |
| 535 | Encode and Decode TinyURL | 74.2% | Medium |
| 290 | Word Pattern | 33.2% | Easy |
| 13 | Roman to Integer | 46.8% | Easy |
| 450 | Delete Node in a BST | 37.2% | Medium |
| 10 | Regular Expression Matching | 24.3% | Hard |
| 186 | Reverse Words in a String II | 27.7% | Medium |
| 208 | Implement Trie (Prefix Tree) | 29.5% | Medium |
| 37 | Sudoku Solver | 31.0% | Hard |
| 140 | Word Break II | 23.9% | Hard |
| 39 | Combination Sum | 39.9% | Medium |
| 138 | Copy List with Random Pointer | 26.1% | Medium |
| 23 | Merge k Sorted Lists | 27.7% | Hard |
| 207 | Course Schedule | 32.8% | Medium |
| 230 | Kth Smallest Element in a BST | 44.5% | Medium |
| 1 | Two Sum | 36.1% | Easy |
| 91 | Decode Ways | 20.0% | Medium |
| 78 | Subsets | 42.5% | Medium |
| 337 | House Robber III | 44.0% | Medium |
| 33 | Search in Rotated Sorted Array | 32.0% | Medium |
| 161 | One Edit Distance | 31.6% | Medium |
| 242 | Valid Anagram | 46.9% | Easy |
| 76 | Minimum Window Substring | 26.1% | Hard |
| 24 | Swap Nodes in Pairs | 38.7% | Medium |
| 202 | Happy Number | 41.1% | Easy |
| 206 | Reverse Linked List | 46.1% | Easy |
| 155 | Min Stack | 29.7% | Easy |
| 121 | Best Time to Buy and Sell Stock | 42.1% | Easy |
| 125 | Valid Palindrome | 26.6% | Easy |
| 373 | Find K Pairs with Smallest Sums | 30.9% | Medium |
| 266 | Palindrome Permutation | 57.5% | Easy |
| 104 | Maximum Depth of Binary Tree | 53.4% | Easy |
| 699 | Falling Squares | 36.5% | Hard |
| 690 | Employee Importance | 52.9% | Easy |
| 516 | Longest Palindromic Subsequence | 42.6% | Medium |
| 8 | String to Integer (atoi) | 13.9% | Medium |
| 171 | Excel Sheet Column Number | 47.7% | Easy |
Bloomberg
| Title | Acceptance | Difficulty | Frequency |
|---|---|---|---|
| 445 | Add Two Numbers II | 45.9% | Medium |
| 138 | Copy List with Random Pointer | 26.1% | Medium |
| 582 | Kill Process | 49.8% | Medium |
| 121 | Best Time to Buy and Sell Stock | 42.1% | Easy |
| 692 | Top K Frequent Words | 40.6% | Medium |
| 387 | First Unique Character in a String | 47.1% | Easy |
| 1 | Two Sum | 36.1% | Easy |
| 117 | Populating Next Right Pointers in Each Node II | 33.8% | Medium |
| 283 | Move Zeroes | 50.7% | Easy |
| 155 | Min Stack | 29.7% | Easy |
| 20 | Valid Parentheses | 33.7% | Easy |
| 56 | Merge Intervals | 31.0% | Medium |
| 146 | LRU Cache | 18.7% | Hard |
| 42 | Trapping Rain Water | 37.2% | Hard |
| 206 | Reverse Linked List | 46.1% | Easy |
| 122 | Best Time to Buy and Sell Stock II | 47.6% | Easy |
| 50 | Pow(x, n) | 26.0% | Medium |
| 2 | Add Two Numbers | 28.1% | Medium |
| 69 | Sqrt(x) | 28.2% | Easy |
| 62 | Unique Paths | 41.9% | Medium |
| 98 | Validate Binary Search Tree | 23.8% | Medium |
| 160 | Intersection of Two Linked Lists | 30.8% | Easy |
| 268 | Missing Number | 44.3% | Easy |
| 53 | Maximum Subarray | 39.9% | Easy |
| 78 | Subsets | 42.5% | Medium |
| 232 | Implement Queue using Stacks | 37.4% | Easy |
| 7 | Reverse Integer | 24.4% | Easy |
| 287 | Find the Duplicate Number | 43.8% | Medium |
| 215 | Kth Largest Element in an Array | 39.9% | Medium |
| 49 | Group Anagrams | 36.4% | Medium |
| 386 | Lexicographical Numbers | 41.8% | Medium |
| 151 | Reverse Words in a String | 15.7% | Medium |
| 139 | Word Break | 30.8% | Medium |
| 102 | Binary Tree Level Order Traversal | 41.0% | Medium |
| 103 | Binary Tree Zigzag Level Order Traversal | 35.5% | Medium |
| 88 | Merge Sorted Array | 32.1% | Easy |
| 3 | Longest Substring Without Repeating Characters | 24.5% | Medium |
| 208 | Implement Trie (Prefix Tree) | 29.5% | Medium |
| 225 | Implement Stack using Queues | 33.5% | Easy |
| 105 | Construct Binary Tree from Preorder and Inorder Traversal | 32.8% | Medium |
| 141 | Linked List Cycle | 35.3% | Easy |
| 230 | Kth Smallest Element in a BST | 44.5% | Medium |
| 5 | Longest Palindromic Substring | 25.3% | Medium |
| 26 | Remove Duplicates from Sorted Array | 35.5% | Easy |
| 33 | Search in Rotated Sorted Array | 32.0% | Medium |
| 13 | Roman to Integer | 46.8% | Easy |
| 8 | String to Integer (atoi) | 13.9% | Medium |
| 63 | Unique Paths II | 32.0% | Medium |
| 297 | Serialize and Deserialize Binary Tree | 34.0% | Hard |
| 172 | Factorial Trailing Zeroes | 36.5% | Easy |
| 101 | Symmetric Tree | 39.5% | Easy |
| 79 | Word Search | 27.4% | Medium |
| 100 | Same Tree | 47.0% | Easy |
| 189 | Rotate Array | 25.0% | Easy |
| 15 | 3Sum | 21.8% | Medium |
| 110 | Balanced Binary Tree | 37.9% | Easy |
| 547 | Friend Circles | 49.2% | Medium |
| 113 | Path Sum II | 34.5% | Medium |
| 24 | Swap Nodes in Pairs | 38.7% | Medium |
| 443 | String Compression | 37.1% | Easy |
| 16 | 3Sum Closest | 31.3% | Medium |
| 266 | Palindrome Permutation | 57.5% | Easy |
| 556 | Next Greater Element III | 28.9% | Medium |
| 11 | Container With Most Water | 36.8% | Medium |
| 158 | Read N Characters Given Read4 II - Call multiple times | 24.5% | Hard |
| 570 | Managers with at Least 5 Direct Reports | 54.3% | Medium |
| 131 | Palindrome Partitioning | 34.4% | Medium |
| 274 | H-Index | 33.5% | Medium |
| 669 | Trim a Binary Search Tree | 57.8% | Easy |
| 714 | Best Time to Buy and Sell Stock with Transaction Fee | 39.4% | Medium |
Microsoft
| Title | Acceptance | Difficulty | Frequency |
|---|---|---|---|
| 138 | Copy List with Random Pointer | 26.1% | Medium |
| 348 | Design Tic-Tac-Toe | 45.8% | Medium |
| 206 | Reverse Linked List | 46.1% | Easy |
| 419 | Battleships in a Board | 62.3% | Medium |
| 273 | Integer to English Words | 22.4% | Hard |
| 171 | Excel Sheet Column Number | 47.7% | Easy |
| 54 | Spiral Matrix | 26.6% | Medium |
| 186 | Reverse Words in a String II | 27.7% | Medium |
| 88 | Merge Sorted Array | 32.1% | Easy |
| 445 | Add Two Numbers II | 45.9% | Medium |
| 235 | Lowest Common Ancestor of a Binary Search Tree | 39.5% | Easy |
| 1 | Two Sum | 36.1% | Easy |
| 53 | Maximum Subarray | 39.9% | Easy |
| 236 | Lowest Common Ancestor of a Binary Tree | 30.0% | Medium |
| 200 | Number of Islands | 35.6% | Medium |
| 21 | Merge Two Sorted Lists | 39.3% | Easy |
| 297 | Serialize and Deserialize Binary Tree | 34.0% | Hard |
| 103 | Binary Tree Zigzag Level Order Traversal | 35.5% | Medium |
| 218 | The Skyline Problem | 28.2% | Hard |
| 116 | Populating Next Right Pointers in Each Node | 36.9% | Medium |
| 73 | Set Matrix Zeroes | 36.2% | Medium |
| 117 | Populating Next Right Pointers in Each Node II | 33.8% | Medium |
| 151 | Reverse Words in a String | 15.7% | Medium |
| 121 | Best Time to Buy and Sell Stock | 42.1% | Easy |
| 13 | Roman to Integer | 46.8% | Easy |
| 48 | Rotate Image | 40.0% | Medium |
| 75 | Sort Colors | 38.4% | Medium |
| 268 | Missing Number | 44.3% | Easy |
| 20 | Valid Parentheses | 33.7% | Easy |
| 141 | Linked List Cycle | 35.3% | Easy |
| 2 | Add Two Numbers | 28.1% | Medium |
| 238 | Product of Array Except Self | 49.8% | Medium |
| 8 | String to Integer (atoi) | 13.9% | Medium |
| 24 | Swap Nodes in Pairs | 38.7% | Medium |
| 5 | Longest Palindromic Substring | 25.3% | Medium |
| 33 | Search in Rotated Sorted Array | 32.0% | Medium |
| 146 | LRU Cache | 18.7% | Hard |
| 98 | Validate Binary Search Tree | 23.8% | Medium |
| 168 | Excel Sheet Column Title | 26.7% | Easy |
| 153 | Find Minimum in Rotated Sorted Array | 40.3% | Medium |
| 237 | Delete Node in a Linked List | 47.0% | Easy |
| 208 | Implement Trie (Prefix Tree) | 29.5% | Medium |
| 232 | Implement Queue using Stacks | 37.4% | Easy |
| 173 | Binary Search Tree Iterator | 42.4% | Medium |
| 160 | Intersection of Two Linked Lists | 30.8% | Easy |
| 4 | Median of Two Sorted Arrays | 22.3% | Hard |
| 26 | Remove Duplicates from Sorted Array | 35.5% | Easy |
| 174 | Dungeon Game | 23.9% | Hard |
| 212 | Word Search II | 24.0% | Hard |
| 102 | Binary Tree Level Order Traversal | 41.0% | Medium |
| 23 | Merge k Sorted Lists | 27.7% | Hard |
| 285 | Inorder Successor in BST | 36.3% | Medium |
| 191 | Number of 1 Bits | 39.9% | Easy |
| 106 | Construct Binary Tree from Inorder and Postorder Traversal | 32.6% | Medium |
| 25 | Reverse Nodes in k-Group | 31.1% | Hard |
| 215 | Kth Largest Element in an Array | 39.9% | Medium |
| 189 | Rotate Array | 25.0% | Easy |
| 71 | Simplify Path | 25.8% | Medium |
| 387 | First Unique Character in a String | 47.1% | Easy |
| 15 | 3Sum | 21.8% | Medium |
| 567 | Permutation in String | 36.6% | Medium |
| 94 | Binary Tree Inorder Traversal | 47.8% | Medium |
| 204 | Count Primes | 26.6% | Easy |
| 46 | Permutations | 45.3% | Medium |
| 56 | Merge Intervals | 31.0% | Medium |
| 28 | Implement strStr() | 28.6% | Easy |
| 124 | Binary Tree Maximum Path Sum | 26.6% | Hard |
| 101 | Symmetric Tree | 39.5% | Easy |
| 165 | Compare Version Numbers | 20.4% | Medium |
| 91 | Decode Ways | 20.0% | Medium |
| 300 | Longest Increasing Subsequence | 38.7% | Medium |
| 114 | Flatten Binary Tree to Linked List | 35.7% | Medium |
| 270 | Closest Binary Search Tree Value | 40.1% | Easy |
| 79 | Word Search | 27.4% | Medium |
| 125 | Valid Palindrome | 26.6% | Easy |
| 162 | Find Peak Element | 38.1% | Medium |
| 258 | Add Digits | 51.5% | Easy |
| 112 | Path Sum | 34.4% | Easy |
| 55 | Jump Game | 29.5% | Medium |
| 513 | Find Bottom Left Tree Value | 56.1% | Medium |
| 672 | Bulb Switcher II | 47.9% | Medium |
| 722 | Remove Comments | 25.8% | Medium |
| 365 | Water and Jug Problem | 27.7% | Medium |
| 443 | String Compression | 37.1% | Easy |
| 452 | Minimum Number of Arrows to Burst Balloons | 44.4% | Medium |
| 591 | Tag Validator | 30.1% | Hard |
| 631 | Design Excel Sum Formula | 27.6% | Hard |
| 47 | Permutations II | 33.7% | Medium |
| 642 | Design Search Autocomplete System | 30.7% | Hard |
| 650 | 2 Keys Keyboard | 44.5% | Medium |
| 651 | 4 Keys Keyboard | 48.8% | Medium |
| 213 | House Robber II | 34.3% | Medium |
| 654 | Maximum Binary Tree | 69.9% | Medium |
| 333 | Largest BST Subtree | 30.6% | Medium |
Amazon
| Title | Acceptance | Difficulty | Frequency |
|---|---|---|---|
| 534 | Design TinyURL | 0.0% | Medium |
| 675 | Cut Off Trees for Golf Event | 26.6% | Hard |
| 1 | Two Sum | 36.1% | Easy |
| 20 | Valid Parentheses | 33.7% | Easy |
| 146 | LRU Cache | 18.7% | Hard |
| 711 | Number of Distinct Islands II | 37.7% | Hard |
| 200 | Number of Islands | 35.6% | Medium |
| 48 | Rotate Image | 40.0% | Medium |
| 438 | Find All Anagrams in a String | 33.8% | Easy |
| 297 | Serialize and Deserialize Binary Tree | 34.0% | Hard |
| 138 | Copy List with Random Pointer | 26.1% | Medium |
| 236 | Lowest Common Ancestor of a Binary Tree | 30.0% | Medium |
| 5 | Longest Palindromic Substring | 25.3% | Medium |
| 239 | Sliding Window Maximum | 33.6% | Hard |
| 460 | LFU Cache | 24.4% | Hard |
| 121 | Best Time to Buy and Sell Stock | 42.1% | Easy |
| 17 | Letter Combinations of a Phone Number | 35.4% | Medium |
| 387 | First Unique Character in a String | 47.1% | Easy |
| 42 | Trapping Rain Water | 37.2% | Hard |
| 238 | Product of Array Except Self | 49.8% | Medium |
| 127 | Word Ladder | 19.7% | Medium |
| 23 | Merge k Sorted Lists | 27.7% | Hard |
| 682 | Baseball Game | 58.7% | Easy |
| 206 | Reverse Linked List | 46.1% | Easy |
| 235 | Lowest Common Ancestor of a Binary Search Tree | 39.5% | Easy |
| 380 | Insert Delete GetRandom O(1) | 39.4% | Medium |
| 2 | Add Two Numbers | 28.1% | Medium |
| 234 | Palindrome Linked List | 33.1% | Easy |
| 449 | Serialize and Deserialize BST | 42.4% | Medium |
| 155 | Min Stack | 29.7% | Easy |
| 240 | Search a 2D Matrix II | 38.8% | Medium |
| 98 | Validate Binary Search Tree | 23.8% | Medium |
| 21 | Merge Two Sorted Lists | 39.3% | Easy |
| 139 | Word Break | 30.8% | Medium |
| 215 | Kth Largest Element in an Array | 39.9% | Medium |
| 49 | Group Anagrams | 36.4% | Medium |
| 517 | Super Washing Machines | 36.5% | Hard |
| 126 | Word Ladder II | 14.5% | Hard |
| 3 | Longest Substring Without Repeating Characters | 24.5% | Medium |
| 242 | Valid Anagram | 46.9% | Easy |
| 160 | Intersection of Two Linked Lists | 30.8% | Easy |
| 141 | Linked List Cycle | 35.3% | Easy |
| 529 | Minesweeper | 49.4% | Medium |
| 186 | Reverse Words in a String II | 27.7% | Medium |
| 167 | Two Sum II - Input array is sorted | 47.2% | Easy |
| 15 | 3Sum | 21.8% | Medium |
| 102 | Binary Tree Level Order Traversal | 41.0% | Medium |
| 78 | Subsets | 42.5% | Medium |
| 545 | Boundary of Binary Tree | 31.9% | Medium |
| 516 | Longest Palindromic Subsequence | 42.6% | Medium |
| 73 | Set Matrix Zeroes | 36.2% | Medium |
| 535 | Encode and Decode TinyURL | 74.2% | Medium |
| 199 | Binary Tree Right Side View | 41.6% | Medium |
| 8 | String to Integer (atoi) | 13.9% | Medium |
| 508 | Most Frequent Subtree Sum | 52.2% | Medium |
| 204 | Count Primes | 26.6% | Easy |
| 538 | Convert BST to Greater Tree | 49.1% | Easy |
| 89 | Gray Code | 41.7% | Medium |
| 414 | Third Maximum Number | 28.0% | Easy |
| 189 | Rotate Array | 25.0% | Easy |
| 451 | Sort Characters By Frequency | 51.1% | Medium |
| 355 | Design Twitter | 25.6% | Medium |
| 532 | K-diff Pairs in an Array | 28.2% | Easy |
| 119 | Pascal's Triangle II | 37.5% | Easy |
| 606 | Construct String from Binary Tree | 49.7% | Easy |
| 617 | Merge Two Binary Trees | 67.6% | Easy |
| 645 | Set Mismatch | 40.0% | Easy |
| 537 | Complex Number Multiplication | 64.0% | Medium |
| 646 | Maximum Length of Pair Chain | 47.7% | Medium |
| 662 | Maximum Width of Binary Tree | 38.1% | Medium |
| 396 | Rotate Function | 33.4% | Medium |
| 536 | Construct Binary Tree from String | 42.8% | Medium |
| 663 | Equal Tree Partition | 36.6% | Medium |
| 692 | Top K Frequent Words | 40.6% | Medium |
| 459 | Repeated Substring Pattern | 38.2% | Easy |
| 579 | Find Cumulative Salary of an Employee | 27.0% | Hard |
| 553 | Optimal Division | 55.2% | Medium |
| 694 | Number of Distinct Islands | 43.8% | Medium |
| 661 | Image Smoother | 45.9% | Easy |
| 640 | Solve the Equation | 38.9% | Medium |
| 725 | Split Linked List in Parts | 49.6% | Medium |
| Title | Acceptance | Difficulty | Frequency |
|---|---|---|---|
| 339 | Nested List Weight Sum | 62.8% | Easy |
| 244 | Shortest Word Distance II | 39.5% | Medium |
| 364 | Nested List Weight Sum II | 53.2% | Medium |
| 170 | Two Sum III - Data structure design | 25.4% | Easy |
| 256 | Paint House | 46.2% | Easy |
| 243 | Shortest Word Distance | 52.9% | Easy |
| 156 | Binary Tree Upside Down | 45.1% | Medium |
| 366 | Find Leaves of Binary Tree | 60.3% | Medium |
| 716 | Max Stack | 32.7% | Easy |
| 254 | Factor Combinations | 43.2% | Medium |
| 245 | Shortest Word Distance III | 50.8% | Medium |
| 205 | Isomorphic Strings | 34.3% | Easy |
| 53 | Maximum Subarray | 39.9% | Easy |
| 297 | Serialize and Deserialize Binary Tree | 34.0% | Hard |
| 605 | Can Place Flowers | 30.1% | Easy |
| 698 | Partition to K Equal Sum Subsets | 36.9% | Medium |
| 50 | Pow(x, n) | 26.0% | Medium |
| 65 | Valid Number | 12.8% | Hard |
| 149 | Max Points on a Line | 15.2% | Hard |
| 68 | Text Justification | 19.6% | Hard |
| 277 | Find the Celebrity | 35.6% | Medium |
| 56 | Merge Intervals | 31.0% | Medium |
| 102 | Binary Tree Level Order Traversal | 41.0% | Medium |
| 236 | Lowest Common Ancestor of a Binary Tree | 30.0% | Medium |
| 152 | Maximum Product Subarray | 26.2% | Medium |
| 187 | Repeated DNA Sequences | 32.2% | Medium |
| 1 | Two Sum | 36.1% | Easy |
| 34 | Search for a Range | 31.4% | Medium |
| 311 | Sparse Matrix Multiplication | 51.8% | Medium |
| 150 | Evaluate Reverse Polish Notation | 27.7% | Medium |
| 464 | Can I Win | 25.2% | Medium |
| 33 | Search in Rotated Sorted Array | 32.0% | Medium |
| 46 | Permutations | 45.3% | Medium |
| 76 | Minimum Window Substring | 26.1% | Hard |
| 104 | Maximum Depth of Binary Tree | 53.4% | Easy |
| 238 | Product of Array Except Self | 49.8% | Medium |
| 127 | Word Ladder | 19.7% | Medium |
| 101 | Symmetric Tree | 39.5% | Easy |
| 57 | Insert Interval | 28.3% | Hard |
| 103 | Binary Tree Zigzag Level Order Traversal | 35.5% | Medium |
| 198 | House Robber | 39.4% | Easy |
| 23 | Merge k Sorted Lists | 27.7% | Hard |
| 21 | Merge Two Sorted Lists | 39.3% | Easy |
| 47 | Permutations II | 33.7% | Medium |
| 515 | Find Largest Value in Each Tree Row | 55.1% | Medium |
| 173 | Binary Search Tree Iterator | 42.4% | Medium |
| 633 | Sum of Square Numbers | 32.3% | Easy |
| 647 | Palindromic Substrings | 55.7% | Medium |
| 671 | Second Minimum Node In a Binary Tree | 41.9% | Easy |
| 367 | Valid Perfect Square | 38.5% | Easy |
| 730 | Count Different Palindromic Subsequences | 25.4% | Hard |