Master DSA Topics - February, 2026

Practice problems across 75+ categories

All Coding Problems

Practice coding problems across all companies and topics 3600 problems | 879 Easy | 1856 Medium | 842 Hard

# Problem Difficulty Topics
3480 Maximize Subarrays After Removing One Conflicting Pair Hard
ArraySegment TreeEnumeration
3481 Apply Substitutions Medium
ArrayHash TableString
3482 Analyze Organization Hierarchy Hard
Database
3483 Longest Special Path II Hard
ArrayHash TableTree
3483 Unique 3-Digit Even Numbers Easy
ArrayHash TableRecursion
3484 Design Spreadsheet Medium
ArrayHash TableString
3485 Longest Common Prefix of K Strings After Removal Hard
ArrayStringTrie
3487 Maximum Unique Subarray Sum After Deletion Easy
ArrayHash TableGreedy
3488 Closest Equal Element Queries Medium
ArrayHash TableBinary Search
3489 Zero Array Transformation IV Medium
ArrayDynamic Programming
3490 Count Beautiful Numbers Hard
Dynamic Programming
3491 Phone Number Prefix Easy
ArrayStringTrie
3492 Maximum Containers on a Ship Easy
Math
3493 Properties Graph Medium
ArrayHash TableDepth-First Search
3494 Find the Minimum Amount of Time to Brew Potions Medium
ArraySimulationPrefix Sum
Showing 3481-3495 of 3602
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public class MyFirstJavaProgram { Edit & Run

   /* This is my first java program.
    * This will print 'Hello, World!' as the output
    */

   public static void main(String []args) {
      System.out.println("Hello, World!"); // prints
   }
}

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