Lucid LeetCode Interview Questions
Lucid has asked 8 distinct LeetCode questions across all recorded interviews: 2 easy, 5 medium and 1 hard. The questions reported most often are Collect Coins in a Tree, Maximum Number of Balls in a Box and Valid Parentheses. 7 of them were reported in interviews from the 6+ Months Ago window. Each question links straight to LeetCode.
| # | Problem | Difficulty | Frequency | Acceptance | |
|---|---|---|---|---|---|
| 1 | Collect Coins in a Tree | Hard | 100 | 36.1% | |
| 2 | Maximum Number of Balls in a Box | Easy | 100 | 74.3% | |
| 3 | Valid Parentheses | Easy | 74 | 42.3% | |
| 4 | Min Stack | Medium | 74 | 56.4% | |
| 5 | Generate Parentheses | Medium | 65 | 77.1% | |
| 6 | Longest Substring Without Repeating Characters | Medium | 65 | 36.9% | |
| 7 | Gas Station | Medium | 65 | 46.4% | |
| 8 | Number of Islands | Medium | 65 | 62.3% |
Where this data comes from
These questions come from the public leetcode-company-wise-problems data set, which collects interview reports from candidates. They are community-reported rather than published by Lucid, so treat the list as a strong signal of what gets asked, not an official or exhaustive syllabus. Last refreshed .
How to read this list
The tabs at the top split the questions by how recently people said they were asked in interviews. "Last 30 Days" is the past month, "Last 3 Months" is the past quarter, and so on. "All Time" is every question on record for this company.
Frequency is a score from 0 to 100 for how often a question showed up in that time window. A higher number means it came up more often, so the list starts with the most common questions first. It is a relative popularity signal within Lucid's questions, not a probability that you will be asked it. Acceptance is LeetCode's own share of submissions that pass for that problem, across all users, not something specific to Lucid. Click any question to open it on LeetCode.