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
841 Difference Between Element Sum and Digit Sum of an Array Easy
ArrayMath
842 Difference Between Maximum and Minimum Price Sum Hard
ArrayDynamic ProgrammingTree
843 Difference Between Ones and Zeros in Row and Column Medium
ArrayMatrixSimulation
844 Difference of Number of Distinct Values on Diagonals Medium
ArrayHash TableMatrix
845 Differences Between Two Objects Medium
JavaScript
846 Different Ways to Add Parentheses Medium
MathStringDynamic Programming
847 Digit Count in Range Hard
MathDynamic Programming
848 Digit Operations to Make Two Integers Equal Medium
MathGraphHeap (Priority Queue)
849 Dinner Plate Stacks Hard
Hash TableStackDesign
850 Disconnect Path in a Binary Matrix by at Most One Flip Medium
ArrayDynamic ProgrammingDepth-First Search
851 Display Table of Food Orders in a Restaurant Medium
ArrayHash TableString
852 Display the First Three Rows Easy
Pandas
853 Distance Between Bus Stops Easy
Array
854 Distance to a Cycle in Undirected Graph Hard
Depth-First SearchBreadth-First SearchUnion Find
855 Distant Barcodes Medium
ArrayHash TableGreedy
Showing 841-855 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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