140 | Word Break II | Hard |
145 | Binary Tree Postorder Traversal | Hard |
146 | LRU Cache | Hard |
149 | Max Points on a Line | Hard |
154 | Find Minimum in Rotated Sorted Array II | Hard |
164 | Maximum Gap | Hard |
174 | Dungeon Game | Hard |
224 | Basic Calculator | Hard |
239 | Sliding Window Maximum | Hard |
273 | Integer to English Words | Hard |
295 | Find Median from Data Stream | Hard |
315 | Count of Smaller Numbers After Self | Hard |
316 | Remove Duplicate Letters | Hard |
332 | Reconstruct Itinerary | Hard |
381 | Insert Delete GetRandom O(1) - Duplicates allowed | Hard |
403 | Frog Jump | Hard |
458 | Poor Pigs | Hard |
514 | Freedom Trail | Hard |
815 | Bus Routes | Hard |
823 | Split Array With Same Average | Hard |
920 | Number of Music Playlists | Hard |
980 | Unique Paths III | Hard |
1074 | Number of Submatrices That Sum to Target | Hard |
1092 | Shortest Common Supersequence | Hard |
1095 | Find in Mountain Array | Hard |
1220 | Count Vowels Permutation | Hard |
1235 | Maximum Profit in Job Scheduling | Hard |
1269 | Number of Ways to Stay in the Same Place After Some Steps | Hard |
1289 | Minimum Falling Path Sum II | Hard |
1335 | Minimum Difficulty of a Job Schedule | Hard |