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
3420 Count Non-Decreasing Subarrays After K Operations Hard
ArrayStackSegment Tree
3421 Find Students Who Improved Medium
Database
3422 Minimum Operations to Make Subarray Elements Equal Medium
ArrayHash TableMath
3423 Maximum Difference Between Adjacent Elements in a Circular Array Easy
Array
3424 Minimum Cost to Make Arrays Identical Medium
ArrayGreedySorting
3425 Longest Special Path Hard
ArrayHash TableTree
3426 Manhattan Distances of All Arrangements of Pieces Hard
MathCombinatorics
3426 Paint House IV Medium
ArrayDynamic Programming
3427 Sum of Variable Length Subarrays Easy
ArrayPrefix Sum
3428 Maximum and Minimum Sums of at Most Size K Subsequences Medium
ArrayMathDynamic Programming
3430 Maximum and Minimum Sums of at Most Size K Subarrays Hard
ArrayMathStack
3431 Minimum Unlocked Indices to Sort Nums Medium
ArrayHash Table
3432 Count Partitions with Even Sum Difference Easy
ArrayMathPrefix Sum
3432 Frequencies of Shortest Supersequences Hard
ArrayStringBit Manipulation
3433 Count Mentions Per User Medium
ArrayMathSorting
Showing 3421-3435 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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