| Find the Last Marked Nodes in Tree | Hard | | |
| Find the Longest Valid Obstacle Course at Each Position | Hard | | |
| Find the Minimum Area to Cover All Ones II | Hard | | |
| Find the Minimum Cost Array Permutation | Hard | | |
| Find the Number of Ways to Place People II | Hard | | |
| Find the Original Typed String II | Hard | | |
| Find the Quiet Students in All Exams | Hard | | |
| Find the String with LCP | Hard | | |
| Find the Subtasks That Did Not Execute | Hard | | |
| Find Top Scoring Students II | Hard | | |
| Find Trending Hashtags II | Hard | | |
| Finding MK Average | Hard | | |
| First Letter Capitalization | Hard | | |
| GCD Sort of an Array | Hard | | |
| Get the Maximum Score | Hard | | |
| Graph Connectivity With Threshold | Hard | | |
| Grid Illumination | Hard | dropbox | |
| Immutability Helper | Hard | | |
| K-Similar Strings | Hard | amazon
google | |
| Kth Smallest Amount With Single Denomination Combination | Hard | | |
| Kth Smallest Number in Multiplication Table | Hard | google
uber | |
| Last Day Where You Can Still Cross | Hard | | |
| Length of the Longest Increasing Path | Hard | | |
| Length of the Longest Valid Substring | Hard | | |
| Lexicographically Smallest Beautiful String | Hard | | |
| Longest Common Suffix Queries | Hard | | |
| Longest Winning Streak | Hard | | |
| Make Array Empty | Hard | | |
| Make Array Non-decreasing or Non-increasing | Hard | | |
| Make String Anti-palindrome | Hard | | |
| Make the XOR of All Segments Equal to Zero | Hard | | |
| Maximize Items | Hard | | |
| Maximize Number of Nice Divisors | Hard | | |
| Maximize Sum of Weights after Edge Removals | Hard | | |
| Maximize the Number of Partitions After Operations | Hard | | |
| Maximize Value of Function in a Ball Passing Game | Hard | | |
| Maximum Average Subarray II | Hard | google | |
| Maximum Building Height | Hard | | |
| Maximum Elegance of a K-Length Subsequence | Hard | | |
| Maximum Equal Frequency | Hard | american-express | |
| Maximum Fruits Harvested After at Most K Steps | Hard | | |
| Maximum GCD-Sum of a Subarray | Hard | | |
| Maximum Genetic Difference Query | Hard | | |
| Maximum Good People Based on Statements | Hard | | |
| Maximum Hamming Distances | Hard | | |
| Maximum Number of Darts Inside of a Circular Dartboard | Hard | facebook | |
| Maximum Number of Groups With Increasing Length | Hard | | |
| Maximum Number of Ones | Hard | qualcomm | |
| Maximum Number of Removal Queries That Can Be Processed I | Hard | | |
| Maximum Number of Visible Points | Hard | | |