| Check for Contradictions in Equations |
Hard
|
|
|
| Closest Node to Path in Tree |
Hard
|
|
|
| Customers With Strictly Increasing Purchases |
Hard
|
|
|
| Design Video Sharing Platform |
Hard
|
|
|
| Dynamic Unpivoting of a Table |
Hard
|
|
|
| Finding the Topic of Each Post |
Hard
|
|
|
| Generate the Invoice |
Hard
|
|
|
| Maximum Cost of Trip With K Highways |
Hard
|
|
|
| Maximum Number of Books You Can Take |
Hard
|
|
|
| Merge Overlapping Events in the Same Hall |
Hard
|
|
|
| Minimize Maximum Value in a Grid |
Hard
|
|
|
| Minimum Costs Using the Train Line |
Hard
|
|
|
| Minimum Flips in Binary Tree to Get Result |
Hard
|
|
|
| Minimum Time to Kill All Monsters |
Hard
|
|
|
| Subtree Removal Game with Fibonacci Tree |
Hard
|
|
|
| The Number of Passengers in Each Bus II |
Hard
|
|
|
| The Number of Seniors and Juniors to Join the Company |
Hard
|
|
|
| The Number of Seniors and Juniors to Join the Company II |
Hard
|
|
|
| First and Last Call On the Same Day |
Hard
|
|
|
| Hopper Company Queries I |
Hard
|
|
|
| Hopper Company Queries II |
Hard
|
|
|
| Hopper Company Queries III |
Hard
|
|
|
| Leetcodify Friends Recommendations |
Hard
|
|
|
| Leetcodify Similar Friends |
Hard
|
|
|
| Maximize the Beauty of the Garden |
Hard
|
|
|
| Move Sub-Tree of N-Ary Tree |
Hard
|
google
|
|
| Next Palindrome Using Same Digits |
Hard
|
|
|
| Page Recommendations II |
Hard
|
|
|
| Sales by Day of the Week |
Hard
|
amazon
|
|
| Sum Of Special Evenly-Spaced Elements In Array |
Hard
|
|
|
| The Most Similar Path in a Graph |
Hard
|
|
|
| Get the Second Most Recent Activity |
Hard
|
microsoft
|
|
| Handshakes That Don't Cross |
Hard
|
amazon
|
|
| Palindrome Removal |
Hard
|
microsoft
|
|
| Total Sales Amount by Year |
Hard
|
|
|
| Market Analysis II |
Hard
|
poshmark
|
|
| Minimum Time to Build Blocks |
Hard
|
google
|
|
| Optimize Water Distribution in a Village |
Hard
|
google
yahoo
|
|
| String Transforms Into Another String |
Hard
|
amazon
google
|
|
| Digit Count in Range |
Hard
|
amazon
|
|
| Number of Distinct Islands II |
Hard
|
amazon
|
|
| K Empty Slots |
Hard
|
amazon
google
microsoft
|
|
| Remove 9 |
Hard
|
google
houzz
|
|
| Average Salary - Departments VS Company |
Hard
|
|
|
| Students Report By Geography |
Hard
|
amazon
|
|
| Design In-Memory File System |
Hard
|
airbnb
amazon
baidu
goldman-sachs
|
|
| Find Cumulative Salary of an Employee |
Hard
|
amazon
|
|
| Median Employee Salary |
Hard
|
google
|
|
| Range Module |
Hard
|
amazon
coupang
google
linkedin
machine-zone
oracle
|
|
| Reverse Pairs |
Hard
|
amazon
bytedance
google
microsoft
uber
|
|