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
2010 The Number of Seniors and Juniors to Join the Company II Hard
Database
2011 Final Value of Variable After Performing Operations Easy
ArrayStringSimulation
2012 Sum of Beauty in the Array Medium
Array
2013 Detect Squares Medium
ArrayHash TableDesign
2014 Longest Subsequence Repeated k Times Hard
StringBacktrackingGreedy
2015 Average Height of Buildings in Each Segment Medium
ArrayGreedySorting
2016 Maximum Difference Between Increasing Elements Easy
Array
2016 The Score of Students Solving Math Expression Hard
ArrayHash TableMath
2017 Grid Game Medium
ArrayMatrixPrefix Sum
2018 Check if Word Can Be Placed In Crossword Medium
ArrayMatrixEnumeration
2020 Number of Accounts That Did Not Stream Medium
Database
2021 Brightest Position on Street Medium
ArraySortingPrefix Sum
2022 Convert 1D Array Into 2D Array Easy
ArrayMatrixSimulation
2023 Number of Pairs of Strings With Concatenation Equal to Target Medium
ArrayHash TableString
2024 Maximize the Confusion of an Exam Medium
StringBinary SearchSliding Window
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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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