Practice problems across 75+ categories
Practice problems frequently asked at Meta • 2900 problems | 652 Easy | 1528 Medium | 703 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 2041 | Nth Magical Number | Hard | MathBinary Search |
| 2042 | Number of Accounts That Did Not Stream | Medium | Database |
| 2043 | Number of Adjacent Elements With the Same Color | Medium | Array |
| 2044 | Number of Arithmetic Triplets | Easy | ArrayHash TableTwo Pointers |
| 2045 | Number of Atoms | Hard | Hash TableStringStack |
| 2046 | Number of Beautiful Integers in the Range | Hard | MathDynamic Programming |
| 2047 | Number of Beautiful Pairs | Easy | ArrayHash TableMath |
| 2048 | Number of Beautiful Partitions | Hard | StringDynamic ProgrammingPrefix Sum |
| 2049 | Number of Bit Changes to Make Two Integers Equal | Easy | Bit Manipulation |
| 2050 | Number of Black Blocks | Medium | ArrayHash TableEnumeration |
| 2051 | Number of Burgers with No Waste of Ingredients | Medium | Math |
| 2052 | Number of Calls Between Two Persons | Medium | Database |
| 2053 | Number of Changing Keys | Easy | String |
| 2054 | Number of Closed Islands | Medium | ArrayDepth-First SearchBreadth-First Search |
| 2055 | Number of Comments per Post | Easy | Database |
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