Practice problems across 75+ categories
Practice problems frequently asked at Microsoft • 3344 problems | 831 Easy | 1747 Medium | 746 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 3241 | Ugly Number III | Medium | MathBinary SearchCombinatorics |
| 3242 | Uncrossed Lines | Medium | ArrayDynamic Programming |
| 3243 | Undefined to Null | Medium | JavaScript |
| 3244 | Unique 3-Digit Even Numbers | Easy | ArrayHash TableRecursion |
| 3245 | Unique Binary Search Trees | Medium | MathDynamic ProgrammingTree |
| 3246 | Unique Binary Search Trees II | Medium | Dynamic ProgrammingBacktrackingTree |
| 3247 | Unique Email Addresses | Easy | ArrayHash TableString |
| 3248 | Unique Length-3 Palindromic Subsequences | Medium | Hash TableStringBit Manipulation |
| 3249 | Unique Morse Code Words | Easy | ArrayHash TableString |
| 3250 | Unique Number of Occurrences | Easy | ArrayHash Table |
| 3251 | Unique Orders and Customers Per Month | Easy | Database |
| 3252 | Unique Paths | Medium | MathDynamic ProgrammingCombinatorics |
| 3253 | Unique Paths II | Medium | ArrayDynamic ProgrammingMatrix |
| 3254 | Unique Paths III | Hard | ArrayBacktrackingBit Manipulation |
| 3255 | Unique Substrings in Wraparound String | Medium | StringDynamic Programming |
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