All companies
Ozon
6 Easy4 Medium1 Hard11 total
| No. | Problem | Difficulty | Frequency |
|---|---|---|---|
| 896 | Monotonic Array | Easy | |
| 1 | Two Sum | Easy | |
| 20 | Valid Parentheses | Easy | |
| 56 | Merge Intervals | Medium | |
| 185 | Department Top Three Salaries | Hard | |
| 394 | Decode String | Medium | |
| 977 | Squares of a Sorted Array | Easy | |
| 121 | Best Time to Buy and Sell Stock | Easy | |
| 242 | Valid Anagram | Easy | |
| 3 | Longest Substring Without Repeating Characters | Medium | |
| 155 | Min Stack | Medium |