| Company | Problem | Difficulty | Times | Period | Link |
|---|---|---|---|---|---|
| HP | Longest Palindrome | Easy | 3 | 6 months ago | https://leetcode.com/problems/longest-palindrome |
| HP | Minimum Cost Homecoming of a Robot in a Grid | Medium | 4 | 6 months ago | https://leetcode.com/problems/minimum-cost-homecoming-of-a-robot-in-a-grid |
| HP | Minimum Recolors to Get K Consecutive Black Blocks | Easy | 6 | 6 months ago | https://leetcode.com/problems/minimum-recolors-to-get-k-consecutive-black-blocks |