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
1201 Find the Most Common Response Medium
ArrayHash TableString
1202 Find the Most Competitive Subsequence Medium
ArrayStackGreedy
1203 Find the N-th Value After K Seconds Medium
ArrayMathSimulation
1204 Find the Number of Copy Arrays Medium
ArrayMath
1205 Find the Number of Distinct Colors Among the Balls Medium
ArrayHash TableSimulation
1206 Find the Number of Good Pairs I Easy
ArrayHash Table
1207 Find the Number of Good Pairs II Medium
ArrayHash Table
1208 Find the Number of K-Even Arrays Medium
Dynamic Programming
1209 Find the Number of Possible Ways for an Event Hard
MathDynamic ProgrammingCombinatorics
1210 Find the Number of Subarrays Where Boundary Elements Are Maximum Hard
ArrayBinary SearchStack
1211 Find the Number of Subsequences With Equal GCD Hard
ArrayMathDynamic Programming
1212 Find the Number of Ways to Place People I Medium
ArrayMathGeometry
1213 Find the Number of Ways to Place People II Hard
ArrayMathGeometry
1214 Find the Number of Winning Players Easy
ArrayHash TableCounting
1215 Find the Occurrence of First Almost Equal Substring Hard
StringString Matching
Showing 1201-1215 of 3600
1 ... 79 80 81 82 83 ... 240

Tutorials Library

Master any technology with our largest free online Library. Browse through 500+ tutorials across 10+ categories.

Python

Python Tutorial

Java

Java Tutorial

JavaScript

JavaScript

C++

C++ Tutorial

C#

C# Tutorial

Go

Go Tutorial

Rust

Rust Tutorial

TypeScript

TypeScript

Swift

Swift Tutorial

Kotlin

Kotlin Tutorial

Ruby

Ruby Tutorial

PHP

PHP Tutorial

C

C Tutorial

Scala

Scala Tutorial

Perl

Perl Tutorial

R

R Tutorial

Dart

Dart Tutorial

Lua

Lua Tutorial

MATLAB

MATLAB

Haskell

Haskell

Developer Toolbox

Powerful online tools to boost your productivity

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
   }
}

Start Coding in Seconds

Coding Ground For Developers

Code, Edit, Run and Share

Ignite your coding potential on Coding Ground - an immersive online platform for hands-on learning, collaboration, and skill development.