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
61 Adding Spaces to a String Medium
ArrayTwo PointersString
62 Adding Two Negabinary Numbers Medium
ArrayMath
63 Additive Number Medium
StringBacktracking
64 Adjacent Increasing Subarrays Detection I Easy
Array
65 Adjacent Increasing Subarrays Detection II Medium
ArrayBinary Search
66 Ads Performance Easy
Database
67 Advantage Shuffle Medium
ArrayTwo PointersGreedy
68 Airplane Seat Assignment Probability Medium
MathDynamic ProgrammingBrainteaser
69 Alert Using Same Key-Card Three or More Times in a One Hour Period Medium
ArrayHash TableString
70 Alice and Bob Playing Flower Game Medium
Math
71 Alien Dictionary Hard
ArrayStringDepth-First Search
72 All Ancestors of a Node in a Directed Acyclic Graph Medium
Depth-First SearchBreadth-First SearchGraph
73 All Divisions With the Highest Score of a Binary Array Medium
Array
74 All Elements in Two Binary Search Trees Medium
TreeDepth-First SearchBinary Search Tree
75 All Nodes Distance K in Binary Tree Medium
Hash TableTreeDepth-First Search
Showing 61-75 of 3600
1 ... 3 4 5 6 7 ... 240

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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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