Tracks/Interview patterns
Interview patterns
Gaps and islands, duplicates, and other classics.
gaps and islands
duplicate detection
top N per group
0/10 solved
- 1—051. Top 3 Products per Category by Pricemedium
- 2—052. Find Duplicate Customer Emailsmedium
- 3—077. Deduplicate Rows with ROW_NUMBERmedium
- 4—083. Find Gaps in Sequential Order IDsmedium
- 5—335. Top-Selling Product in Each Regionmedium
- 6—344. Top Salesperson Each Quartermedium
- 7—351. Most Popular Product Each Monthmedium
- 8—370. Peak Order Hour per Daymedium
- 9—092. Longest Consecutive Login Streakhard
- 10—392. Revenue-Maximizing Price per Producthard