Hash Map
29 practice items · needed by 17 roles
Easy 9Medium 16Hard 4
Coding problems
- Banner From Letter Tileseasy
- Dedupe Records by Keyeasy
- First Non-Repeating Charactereasy
- Most Common Allowed Wordeasy
- One-to-One Letter Ciphereasy
- Pair With Target Sumeasy
- Pairs With an Exact Price Gapeasy
- Same Letters Checkeasy
- Warehouse Robot Moveseasy
- Bucket Words by Lettersmedium
- Build a Threaded Comment Treemedium
- Card Velocity and Geo Fraud Rulesmedium
- Count Subarrays With a Given Summedium
- Endpoint Report from Access Logsmedium
- Group By and Aggregatemedium
- Join Two Record Listsmedium
- Longest Balanced Bit Stretchmedium
- Longest Span With K Distinct Productsmedium
- Longest Substring With Distinct Charactersmedium
- Most Frequent Valuesmedium
- Reconcile Bank and Ledgermedium
- Replay an LRU Cachemedium
- Sort by Popularitymedium
- Stretches With a Divisible Totalmedium
- Top TF-IDF Terms of a Documentmedium
- Most Survey Points on One Linehard
- Simulate a Snake Gamehard
- Smallest Covering Substringhard
- Stretches With Exactly K Distinct Valueshard