Practice problems across 75+ categories
Practice problems frequently asked at Hash Table • 719 problems | 168 Easy | 418 Medium | 127 Hard
| # | Problem | Difficulty | Topics |
|---|---|---|---|
| 691 | Tweet Counts Per Frequency | Medium | Hash TableStringBinary Search |
| 692 | Two Out of Three | Easy | ArrayHash TableBit Manipulation |
| 693 | Two Sum | Easy | ArrayHash Table |
| 694 | Two Sum III - Data structure design | Easy | ArrayHash TableTwo Pointers |
| 695 | Two Sum IV - Input is a BST | Unknown | Hash TableTwo PointersTree |
| 696 | Ugly Number II | Medium | Hash TableMathDynamic Programming |
| 697 | Uncommon Words from Two Sentences | Easy | Hash TableStringCounting |
| 698 | Unique 3-Digit Even Numbers | Easy | ArrayHash TableRecursion |
| 699 | Unique Email Addresses | Easy | ArrayHash TableString |
| 700 | Unique Length-3 Palindromic Subsequences | Medium | Hash TableStringBit Manipulation |
| 701 | Unique Morse Code Words | Easy | ArrayHash TableString |
| 702 | Unique Number of Occurrences | Easy | ArrayHash Table |
| 703 | Unique Word Abbreviation | Medium | ArrayHash TableString |
| 704 | Using a Robot to Print the Lexicographically Smallest String | Medium | Hash TableStringStack |
| 705 | Valid Anagram | Easy | Hash TableStringSorting |
Powerful online tools to boost your productivity
Coding Ground For Developers
Code, Edit, Run and ShareIgnite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.
