2/13/2017 第一轮电面
493 reverse pairs
You have solved 163/ 164 problems.
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| # | Title | Acceptance | Difficulty | Frequency | |
|---|---|---|---|---|---|
| 388 | Longest Absolute File Path | 35.5% | Medium | ||
| 482 | License Key Formatting | 41.2% | Medium | ||
| 340 | Longest Substring with At Most K Distinct Characters | 38.5% | Hard | ||
| 308 | Range Sum Query 2D - Mutable | 20.6% | Hard | ||
| 418 | Sentence Screen Fitting | 27.4% | Medium | ||
| 425 | Word Squares | 42.6% | Hard | ||
| 298 | Binary Tree Longest Consecutive Sequence | 40.2% | Medium | ||
| 281 | Zigzag Iterator | 48.9% | Medium | ||
| 361 | Bomb Enemy | 38.2% | Medium | ||
| 346 | Moving Average from Data Stream | 57.7% | Easy | ||
| 163 | Missing Ranges | 26.5% | Medium | ||
| 394 | Decode String | 40.5% | Medium | ||
| 66 | Plus One | 37.2% | Easy | ||
| 317 | Shortest Distance from All Buildings | 33.4% | Hard | ||
| 271 | Encode and Decode Strings | 26.3% | Medium | ||
| 288 | Unique Word Abbreviation | 15.6% | Medium | ||
| 393 | UTF-8 Validation | 35.3% | Medium | ||
| 305 | Number of Islands II | 38.4% | Hard | ||
| 280 | Wiggle Sort | 55.7% | Medium | ||
| 351 | Android Unlock Patterns | 43.0% | Medium | ||
| 259 | 3Sum Smaller | 40.8% | Medium | ||
| 200 | Number of Islands | 32.7% | Medium | ||
| 289 | Game of Life | 36.4% | Medium | ||
| 246 | Strobogrammatic Number | 39.2% | Easy | ||
| 471 | Encode String with Shortest Length | 42.3% | Hard | ||
| 406 | Queue Reconstruction by Height | 54.6% | Medium | ||
| 391 | Perfect Rectangle | 24.9% | Hard | ||
| 279 | Perfect Squares | 35.4% | Medium | ||
| 465 | Optimal Account Balancing | 31.3% | Hard | ||
| 218 | The Skyline Problem | 25.9% | Hard | ||
| 345 | Reverse Vowels of a String | 37.5% | Easy | ||
| 417 | Pacific Atlantic Water Flow | 32.9% | Medium | ||
| 286 | Walls and Gates | 42.9% | Medium | ||
| 407 | Trapping Rain Water II | 35.9% | Hard | ||
| 56 | Merge Intervals | 28.7% | Medium | ||
| 297 | Serialize and Deserialize Binary Tree | 32.1% | Hard | ||
| 320 | Generalized Abbreviation | 43.9% | Medium | ||
| 399 | Evaluate Division | 39.8% | Medium | ||
| 329 | Longest Increasing Path in a Matrix | 35.7% | Hard | ||
| 247 | Strobogrammatic Number II | 38.6% | Medium | ||
| 490 | The Maze | 43.3% | Medium | ||
| 505 | The Maze II | 32.6% | Medium | ||
| 159 | Longest Substring with At Most Two Distinct Characters | 39.9% | Hard | ||
| 362 | Design Hit Counter | 53.0% | Medium | ||
| 295 | Find Median from Data Stream | 23.9% | Hard | ||
| 484 | Find Permutation | 50.7% | Medium | ||
| 284 | Peeking Iterator | 35.2% | Medium | ||
| 294 | Flip Game II | 45.6% | Medium | ||
| 228 | Summary Ranges | 28.4% | Medium | ||
| 411 | Minimum Unique Word Abbreviation | 31.5% | Hard | ||
| 146 | LRU Cache | 16.3% | Hard | ||
| 380 | Insert Delete GetRandom O(1) | 38.6% | Medium | ||
| 359 | Logger Rate Limiter | 58.3% | Easy | ||
| 341 | Flatten Nested List Iterator | 39.3% | Medium | ||
| 293 | Flip Game | 54.4% | Easy | ||
| 315 | Count of Smaller Numbers After Self | 33.7% | Hard | ||
| 42 | Trapping Rain Water | 35.6% | Hard | ||
| 389 | Find the Difference | 51.1% | Easy | ||
| 401 | Binary Watch | 44.1% | Easy | ||
| 276 | Paint Fence | 34.1% | Easy | ||
| 360 | Sort Transformed Array | 43.3% | Medium | ||
| 274 | H-Index | 32.3% | Medium | ||
| 253 | Meeting Rooms II | 38.5% | Medium | ||
| 239 | Sliding Window Maximum | 31.7% | Hard | ||
| 400 | Nth Digit | 30.1% | Easy | ||
| 249 | Group Shifted Strings | 39.4% | Medium | ||
| 212 | Word Search II | 22.5% | Hard | ||
| 318 | Maximum Product of Word Lengths | 42.6% | Medium | ||
| 128 | Longest Consecutive Sequence | 35.6% | Hard | ||
| 269 | Alien Dictionary | 22.1% | Hard | ||
| 270 | Closest Binary Search Tree Value | 38.4% | Easy | ||
| 463 | Island Perimeter | 55.8% | Easy | ||
| 230 | Kth Smallest Element in a BST | 42.3% | Medium | ||
| 20 | Valid Parentheses | 32.4% | Easy | ||
| 369 | Plus One Linked List | 53.2% | Medium | ||
| 158 | Read N Characters Given Read4 II - Call multiple times | 24.4% | Hard | ||
| 162 | Find Peak Element | 36.1% | Medium | ||
| 139 | Word Break | 28.6% | Medium | ||
| 358 | Rearrange String k Distance Apart | 31.8% | Hard | ||
| 415 | Add Strings | 41.2% | Easy | ||
| 373 | Find K Pairs with Smallest Sums | 30.0% | Medium | ||
| 409 | Longest Palindrome | 44.6% | Easy | ||
| 10 | Regular Expression Matching | 23.7% | Hard | ||
| 327 | Count of Range Sum | 29.0% | Hard | ||
| 4 | Median of Two Sorted Arrays | 21.0% | Hard | ||
| 460 | LFU Cache | 20.7% | Hard | ||
| 421 | Maximum XOR of Two Numbers in an Array | 43.6% | Medium | ||
| 332 | Reconstruct Itinerary | 28.2% | Medium | ||
| 155 | Min Stack | 26.7% | Easy | ||
| 422 | Valid Word Square | 36.2% | Easy | ||
| 240 | Search a 2D Matrix II | 38.0% | Medium | ||
| 324 | Wiggle Sort II | 25.3% | Medium | ||
| 23 | Merge k Sorted Lists | 26.2% | Hard | ||
| 166 | Fraction to Recurring Decimal | 16.9% | Medium | ||
| 266 | Palindrome Permutation | 55.7% | Easy | ||
| 348 | Design Tic-Tac-Toe | 45.3% | Medium | ||
| 336 | Palindrome Pairs | 25.0% | Hard | ||
| 140 | Word Break II | 22.4% | Hard | ||
| 133 | Clone Graph | 25.1% | Medium | ||
| 173 | Binary Search Tree Iterator | 39.5% | Medium | ||
| 231 | Power of Two | 39.4% | Easy | ||
| 57 | Insert Interval | 26.6% | Hard | ||
| 54 | Spiral Matrix | 24.8% | Medium | ||
| 22 | Generate Parentheses | 42.4% | Medium | ||
| 31 | Next Permutation | 28.3% | Medium | ||
| 382 | Linked List Random Node | 46.3% | Medium | ||
| 224 | Basic Calculator | 25.8% | Hard | ||
| 402 | Remove K Digits | 26.0% | Medium | ||
| 17 | Letter Combinations of a Phone Number | 32.8% | Medium | ||
| 251 | Flatten 2D Vector | 39.2% | Medium | ||
| 50 | Pow(x, n) | 26.9% | Medium | ||
| 444 | Sequence Reconstruction | 19.8% | Medium | ||
| 272 | Closest Binary Search Tree Value II | 37.8% | Hard | ||
| 309 | Best Time to Buy and Sell Stock with Cooldown | 39.9% | Medium | ||
| 44 | Wildcard Matching | 19.2% | Hard | ||
| 379 | Design Phone Directory | 30.4% | Medium | ||
| 375 | Guess Number Higher or Lower II | 35.2% | Medium | ||
| 353 | Design Snake Game | 25.8% | Medium | ||
| 302 | Smallest Rectangle Enclosing Black Pixels | 44.3% | Hard | ||
| 408 | Valid Word Abbreviation | 27.5% | Easy | ||
| 354 | Russian Doll Envelopes | 31.9% | Hard | ||
| 397 | Integer Replacement | 29.4% | Medium | ||
| 356 | Line Reflection | 30.2% | Medium | ||
| 282 | Expression Add Operators | 28.8% | Hard | ||
| 368 | Largest Divisible Subset | 33.3% | Medium | ||
| 363 | Max Sum of Rectangle No Larger Than K | 32.2% | Hard | ||
| 451 | Sort Characters By Frequency | 50.0% | Medium | ||
| 208 | Implement Trie (Prefix Tree) | 26.1% | Medium | ||
| 214 | Shortest Palindrome | 23.3% | Hard | ||
| 261 | Graph Valid Tree | 36.8% | Medium | ||
| 313 | Super Ugly Number | 37.1% | Medium | ||
| 459 | Repeated Substring Pattern | 38.8% | Easy | ||
| 378 | Kth Smallest Element in a Sorted Matrix | 43.5% | Medium | ||
| 321 | Create Maximum Number | 24.1% | Hard | ||
| 377 | Combination Sum IV | 41.5% | Medium | ||
| 331 | Verify Preorder Serialization of a Binary Tree | 35.4% | Medium | ||
| 374 | Guess Number Higher or Lower | 33.9% | Easy | ||
| 326 | Power of Three | 39.5% | Easy | ||
| 257 | Binary Tree Paths | 35.6% | Easy | ||
| 506 | Relative Ranks | 50.2% | Easy | ||
| 312 | Burst Balloons | 41.9% | Hard | ||
| 314 | Binary Tree Vertical Order Traversal | 35.9% | Medium | ||
| 316 | Remove Duplicate Letters | 28.7% | Hard | ||
| 323 | Number of Connected Components in an Undirected Graph | 47.1% | Medium | ||
| 330 | Patching Array | 31.7% | Hard | ||
| 357 | Count Numbers with Unique Digits | 45.2% | Medium | ||
| 370 | Range Addition | 54.2% | Medium | ||
| 447 | Number of Boomerangs | 43.2% | Easy | ||
| 448 | Find All Numbers Disappeared in an Array | 53.6% | Easy | ||
| 469 | Convex Polygon | 29.6% | Medium | ||
| 474 | Ones and Zeroes | 36.8% | Medium | ||
| 310 | Minimum Height Trees | 28.6% | Medium | ||
| 480 | Sliding Window Median | 30.9% | Hard | ||
| 481 | Magical String | 46.3% | Medium | ||
| 483 | Smallest Good Base | 29.8% | Hard | ||
| 485 | Max Consecutive Ones | 55.5% | Easy | ||
| 486 | Predict the Winner | 43.4% | Medium | ||
| 487 | Max Consecutive Ones II | 42.4% | Medium | ||
| 493 | Reverse Pairs | 14.7% | Hard | ||
| 494 | Target Sum | 44.5% | Medium | ||
| 498 | Diagonal Traverse | 46.2% | Medium | ||
| 501 | Find Mode in Binary Search Tree | 39.5% | Easy | ||
| 503 | Next Greater Element II | 45.7% | Medium | ||
| 475 | Heaters | 29.9% | Easy |