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
466 Convert an Array Into a 2D Array With Conditions Medium
ArrayHash Table
467 Convert Binary Number in a Linked List to Integer Easy
Linked ListMath
468 Convert Binary Search Tree to Sorted Doubly Linked List Medium
Linked ListStackTree
469 Convert BST to Greater Tree Medium
TreeDepth-First SearchBinary Search Tree
470 Convert Callback Based Function to Promise Based Function Medium
JavaScript
471 Convert Date Format Easy
Database
472 Convert Date to Binary Easy
MathString
473 Convert Doubly Linked List to Array I Easy
ArrayLinked ListDoubly-Linked List
474 Convert Doubly Linked List to Array II Medium
ArrayLinked ListDoubly-Linked List
475 Convert Integer to the Sum of Two No-Zero Integers Easy
Math
476 Convert JSON String to Object Hard
JavaScript
477 Convert Object to JSON String Medium
JavaScript
478 Convert Sorted Array to Binary Search Tree Easy
ArrayDivide and ConquerTree
479 Convert Sorted List to Binary Search Tree Medium
Linked ListDivide and ConquerTree
480 Convert the Temperature Easy
Math
Showing 466-480 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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