| ID | Title | Difficulty |
|---|---|---|
| 1970 | Last Day Where You Can Still Cross | Hard |
| 1971 | Find if Path Exists in Graph | Easy |
| 2092 | Find All People With Secret | Hard |
| 2192 | All Ancestors of a Node in a Directed Acyclic Graph | Medium |
| 2196 | Create Binary Tree From Descriptions | Medium |
| 2385 | Amount of Time for Binary Tree to Be Infected | Medium |