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
2775 Undefined to Null Medium
JavaScript
2776 Convert Callback Based Function to Promise Based Function Medium
JavaScript
2777 Date Range Generator Medium
JavaScript
2778 Sum of Squares of Special Elements Easy
ArrayEnumeration
2779 Maximum Beauty of an Array After Applying Operation Medium
ArrayBinary SearchSliding Window
2780 Minimum Index of a Valid Split Medium
ArrayHash TableSorting
2781 Length of the Longest Valid Substring Hard
ArrayHash TableString
2782 Number of Unique Categories Medium
Union FindInteractiveCounting
2783 Flight Occupancy and Waitlist Analysis Medium
Database
2784 Check if Array is Good Easy
ArrayHash TableSorting
2785 Sort Vowels in a String Medium
StringSorting
2786 Visit Array Positions to Maximize Score Medium
ArrayDynamic Programming
2787 Maximum Number of Groups With Increasing Length Hard
ArrayMathBinary Search
2787 Ways to Express an Integer as Sum of Powers Medium
Dynamic Programming
2788 Count Paths That Can Form a Palindrome in a Tree Hard
Dynamic ProgrammingBit ManipulationTree
Showing 2776-2790 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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