| Status | Title | Video | Leetcode | Solve | Difficulty | Companies | Topics |
|---|---|---|---|---|---|---|---|
| 173. Binary Search Tree Iterator | Solve | Medium | Amazon+5 | ||||
| 251. Flatten 2D Vector | Solve | Medium | Airbnb | ||||
| 281. Zigzag Iterator | Solve | Medium | Amazon+3 | ||||
| 284. Peeking Iterator | Solve | Medium | Amazon+3 | ||||
| 341. Flatten Nested List Iterator | Solve | Medium | Airbnb+10 | ||||
| 604. Design Compressed String Iterator | Solve | Easy | Google | ||||
| 900. RLE Iterator | Solve | Medium | Google | ||||
| 1286. Iterator for Combination | Solve | Medium | Uber | ||||
| 1586. Binary Search Tree Iterator II | Solve | Medium | Facebook |