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
3015 Count the Number of Houses at a Certain Distance I Medium
Breadth-First SearchGraphPrefix Sum
3015 Maximum Number of Removal Queries That Can Be Processed I Hard
ArrayDynamic Programming
3016 Minimum Number of Pushes to Type Word II Medium
Hash TableStringGreedy
3017 Count the Number of Houses at a Certain Distance II Hard
GraphPrefix Sum
3019 Number of Changing Keys Easy
String
3020 Find Pattern in Infinite Stream I Medium
ArraySliding WindowRolling Hash
3020 Find the Maximum Number of Elements in Subset Medium
ArrayHash TableEnumeration
3021 Alice and Bob Playing Flower Game Medium
Math
3022 Minimize OR of Remaining Elements Using Operations Hard
ArrayGreedyBit Manipulation
3024 Type of Triangle Easy
ArrayMathSorting
3025 Find the Number of Ways to Place People I Medium
ArrayMathGeometry
3026 Maximum Good Subarray Sum Medium
ArrayHash TablePrefix Sum
3027 Find the Grid of Region Average Medium
ArrayMatrix
3027 Find the Number of Ways to Place People II Hard
ArrayMathGeometry
3028 Ant on the Boundary Easy
ArraySimulationPrefix Sum
Showing 3016-3030 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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