Master DSA Topics - January, 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
2971 Reported Posts Easy
Database
2972 Reported Posts II Medium
Database
2973 Reschedule Meetings for Maximum Free Time I Medium
ArrayGreedySliding Window
2974 Reschedule Meetings for Maximum Free Time II Medium
ArrayGreedyEnumeration
2975 Reshape Data: Concatenate Easy
Database
2976 Reshape Data: Melt Easy
Database
2977 Reshape Data: Pivot Easy
Database
2978 Reshape the Matrix Easy
ArrayMatrixSimulation
2979 Restaurant Growth Medium
Database
2980 Restore IP Addresses Medium
StringBacktracking
2981 Restore The Array Hard
StringDynamic Programming
2982 Restore the Array From Adjacent Pairs Medium
ArrayHash TableDepth-First Search
2983 Resulting String After Adjacent Removals Medium
StringStackSimulation
2984 Return Length of Arguments Passed Easy
JavaScript
2985 Reveal Cards In Increasing Order Medium
ArrayQueueSorting
Showing 2971-2985 of 3600
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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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