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
1995 Count Special Quadruplets Easy
ArrayHash TableEnumeration
1996 The Number of Weak Characters in the Game Medium
ArrayStackGreedy
1997 First Day Where You Have Been in All the Rooms Medium
ArrayDynamic Programming
1998 GCD Sort of an Array Hard
ArrayMathUnion Find
1999 Smallest Greater Multiple Made of Two Digits Medium
MathEnumeration
2000 Reverse Prefix of Word Easy
Two PointersStringStack
2000 Smallest Missing Genetic Value in Each Subtree Hard
Dynamic ProgrammingTreeDepth-First Search
2001 Number of Pairs of Interchangeable Rectangles Medium
ArrayHash TableMath
2002 Maximum Product of the Length of Two Palindromic Subsequences Medium
StringDynamic ProgrammingBacktracking
2004 The Number of Seniors and Juniors to Join the Company Hard
Database
2005 Subtree Removal Game with Fibonacci Tree Hard
MathDynamic ProgrammingTree
2006 Count Number of Pairs With Absolute Difference K Easy
ArrayHash TableCounting
2007 Find Original Array From Doubled Array Medium
ArrayHash TableGreedy
2008 Maximum Earnings From Taxi Medium
ArrayHash TableBinary Search
2009 Minimum Number of Operations to Make Array Continuous Hard
ArrayHash TableBinary Search
Showing 1996-2010 of 3602
1 ... 132 133 134 135 136 ... 241

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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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