All companies
Citi
2 Easy4 Medium1 Hard7 total
| No. | Problem | Difficulty | Frequency |
|---|---|---|---|
| 1 | Two Sum | Easy | |
| 121 | Best Time to Buy and Sell Stock | Easy | |
| 150 | Evaluate Reverse Polish Notation | Medium | |
| 48 | Rotate Image | Medium | |
| 209 | Minimum Size Subarray Sum | Medium | |
| 1944 | Number of Visible People in a Queue | Hard | |
| 3 | Longest Substring Without Repeating Characters | Medium |